[Fire TV General] Bropinski:
Please note, this method will work with firmware version 5.2.6.0 and lower. This will NOT work on firmware 5.2.6.1 or higher.

First and foremost, thanks to @bibikalka for his thread on disabling OTA updates on the Amazon Fire TV Stick 2nd Gen. As well as @patriot1889 for creating an app Confireator which allows users to still be able to access the Factory Restore option, WiFi settings, Bluetooth settings and Application Settings in a easy user interface. Finally, thanks to @esc0rtd3w's script to removing bloat on the First Gen Amazon Fire TV Stick which is what I used as a base for what I removed: https://github.com/esc0rtd3w/firestick-loader/blob/master/scripts/debloat/bloat-disable.sh

Run these commands from your ADB using "adb uninstall -k --user 0 "

Below are all the APKs I have disabled. This will remove

ALL

Amazon features including the launcher, appstore, videos, etc. Make sure you have a different launcher as well as Confireator so you are still able to access the Factory Restore option, WiFi settings, Bluetooth settings and Application Settings. I also suggest using Launcher Hyjack so home button recognition works. Proceed ONLY if you use your Fire Stick v2 for non-Amazon activities and want the performance boost for your device. You have been warned.

Here is a list of everything I have disabled:

adb uninstall -k --user 0 com.amazon.device.software.ota
adb uninstall -k --user 0 com.amazon.device.software.ota.override
adb uninstall -k --user 0 android.amazon.perm
adb uninstall -k --user 0 com.amazon.ags.app
adb uninstall -k --user 0 com.amazon.android.marketplace
adb uninstall -k --user 0 com.amazon.bueller.music
adb uninstall -k --user 0 com.amazon.bueller.notification
adb uninstall -k --user 0 com.amazon.client.metrics
adb uninstall -k --user 0 com.amazon.client.metrics.api
adb uninstall -k --user 0 com.amazon.communication.discovery
adb uninstall -k --user 0 com.amazon.connectivitydiag
adb uninstall -k --user 0 com.amazon.dcp
adb uninstall -k --user 0 com.amazon.device.crashmanager
adb uninstall -k --user 0 com.amazon.device.logmanager
adb uninstall -k --user 0 com.amazon.device.messaging
adb uninstall -k --user 0 com.amazon.device.sync
adb uninstall -k --user 0 com.amazon.devicecontrol
adb uninstall -k --user 0 com.amazon.dp.logger
adb uninstall -k --user 0 com.amazon.identity.auth.device.authorization
adb uninstall -k --user 0 com.amazon.imp
adb uninstall -k --user 0 com.amazon.kindle.cms
adb uninstall -k --user 0 com.amazon.kindle.devicecontrols
adb uninstall -k --user 0 com.amazon.kso.blackbird
adb uninstall -k --user 0 com.amazon.ods.kindleconnect
adb uninstall -k --user 0 com.amazon.parentalcontrols
adb uninstall -k --user 0 com.amazon.platform.fdrw
adb uninstall -k --user 0 com.amazon.precog
adb uninstall -k --user 0 com.amazon.providers
adb uninstall -k --user 0 com.amazon.providers.contentsupport
adb uninstall -k --user 0 com.amazon.recess
adb uninstall -k --user 0 com.amazon.securitysyncclient
adb uninstall -k --user 0 com.amazon.settings.systemupdates
adb uninstall -k --user 0 com.amazon.sharingservice.android.client.proxy
adb uninstall -k --user 0 com.amazon.shpm
adb uninstall -k --user 0 com.amazon.sync.provider.ipc
adb uninstall -k --user 0 com.amazon.sync.service
adb uninstall -k --user 0 com.amazon.tcomm
adb uninstall -k --user 0 com.amazon.tcomm.client
adb uninstall -k --user 0 com.amazon.tmm.tutorial
adb uninstall -k --user 0 com.amazon.tv.csapp
adb uninstall -k --user 0 com.amazon.tv.fw.metrics
adb uninstall -k --user 0 com.amazon.tv.legal.notices
adb uninstall -k --user 0 com.amazon.tv.oobe
adb uninstall -k --user 0 com.amazon.tv.support
adb uninstall -k --user 0 com.amazon.tz.webcryptotzservice
adb uninstall -k --user 0 com.amazon.videoads.app
adb uninstall -k --user 0 com.amazon.visualonawv
adb uninstall -k --user 0 com.android.captiveportallogin
adb uninstall -k --user 0 com.amazon.vizzini
adb uninstall -k --user 0 com.amazon.storm.lightning.services
adb uninstall -k --user 0 com.amazon.storm.lightning.tutorial
adb uninstall -k --user 0 com.amazon.whisperlink.core.android
adb uninstall -k --user 0 com.amazon.whisperplay.contracts
adb uninstall -k --user 0 com.amazon.whisperplay.service.install
adb uninstall -k --user 0 com.amazon.wcast.sink
adb uninstall -k --user 0 com.amazon.avod
adb uninstall -k --user 0 com.amazon.shoptv.client
adb uninstall -k --user 0 com.amazon.venezia
adb uninstall -k --user 0 com.amazon.webview
adb uninstall -k --user 0 com.svox.pico
adb uninstall -k --user 0 com.amazon.tv.launcher
adb uninstall -k --user 0 com.android.managedprovisioning
adb uninstall -k --user 0 amazon.jackson19
adb uninstall -k --user 0 com.amazon.tv.nimh
adb uninstall -k --user 0 com.ivona.tts.oem
adb uninstall -k --user 0 com.ivona.orchestrator
adb uninstall -k --user 0 com.amazon.advertisingidsettings
adb uninstall -k --user 0 com.amazon.dobly

Below are all the APKs I did

NOT

remove. These are the result of me preforming a "adb shell pm list packages"

com.amazon.tv.resolutioncycler
com.amazon.ssmsys
com.amazon.tv.ime
com.android.providers.media
com.amazon.dcp.contracts.library
com.android.wallpapercropper
com.amazon.metrics.api
com.amazon.device.controllermanager
amazon.fireos
com.android.documentsui
com.android.externalstorage
com.android.htmlviewer
de.szalkowski.activitylauncher
com.amazon.alta.h2clientservice
com.android.providers.downloads
com.amazon.tv.parentalcontrols
com.android.providers.tv
com.amazon.tv.ottssolib
com.android.inputmethod.pinyin
com.android.defcontainer
com.android.providers.downloads.ui
com.android.pacprocessor
com.amazon.tv.intentsupport
com.android.certinstaller
android
com.amazon.ssm
com.amazon.fireinputdevices
com.android.backupconfirm
com.mediatek.floatmenu
com.android.providers.settings
com.amazon.kindleautomatictimezone
com.android.sharedstoragebackup
de.belu.appstarter
com.amazon.unifiedshare.actionchooser
com.amazon.device.messaging.sdk.internal.library
com.amazon.tv.settings
com.android.keychain
com.amazon.device.sale.service
com.android.packageinstaller
com.amazon.device.settings.sdk.internal.library
com.android.proxyhandler
com.amazon.acos.providers.UnifiedSettingsProvider
com.amazon.wifilocker
com.amazon.dcp.contracts.framework.library
com.amazon.android.service.networkmonitor
com.android.vpndialogs
com.amazon.awvflingreceiver
com.amazon.application.compatibility.enforcer
com.android.shell
com.baronkiko.launcherhijack
com.android.providers.userdictionary
com.android.location.fused
com.android.systemui
com.amazon.bluetoothinternals
com.amazon.device.settings
com.amazon.device.sync.sdk.internal
com.android.bluetooth
com.amazon.device.lowstoragemanager
com.amazon.webview.chromium
com.amazon.webview.metrics.service
com.amazon.application.compatibility.enforcer.sdk.library

DO NOT DISABLE THE FOLLOWING BELOW OR ELSE YOU WILL NOT BE ABLE TO FACTORY RESET!

com.amazon.tv.settings
com.amazon.tv.settings/com.amazon.tv.settings.tv.AppDisableService
com.amazon.tv.settings/com.amazon.tv.settings.tv.FactoryResetActivity

This is as good as it is going to get in terms of getting better performance for us 2nd Gen Fire TV Stick Users out there... until we get root (hopefully)!