[Xperia Z1 Compact General] Illutorium:
Useful:

CallWidgetPermission (Important of Calling)

ExperienceFlow2LiveWallpaper (Sony Stock Live Wallpaper)

SmartSearch (Important of Contacts)

Theme000 (Multi)

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Can be replace without affect:

SemcMusic -> Vanilla Music (<1MB)

SemcNotes -> com.taxaly.noteme.v2 (<600kb)

Conversations -> rpkandrodev.yaata (<3MB|SMS/MMS)

Album/Movies/Photo Editor (>16MB) -> com.simplemobiletools.gallery (<4MB|Can be hardware play on .webm/.mp4|Snapdragon 800 can be handle of VP9+Opus when Stock Video are be more crashes than this as a non-problem.)

Calculator -> 30kb Calculator [com.gmail.psixgame.intelli.calc] - Straight Fastest calculator ever'

Stock calendar -> Touch Calendar (<2MB)

textinput-tng -> "Simple Keyboard" (Maybe doesn't had a Dictonaries but I am sure that are be fastest than Stock)

com.mobisystems.fileman -> X-Plore (Dual window)

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Can be updates without affect:

WebViewGoogle -> Of Newest

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Useless:

ActiveClipper {?}

AnonymousData

AndroidForWork

ar-effect

ArtFilterCamera

BrowserProviderProxy

CrashMonitor

CrashMonitorSystem

CustomizationPresetContacts

device-monitor

DownloadProviderUi (Doesn't affect at Without UI downloader.)

EnchantedForest (Useless theme)

Exchange2

Exchange3Google

FaceLock

FBCalendarSync

Galaxy4

GoogleAnalyticsProxy

GoogleLyricsPlugin

GoogleTTS

helpapp

HTMLViewer

IddAgent

ims {?}

infoeye

JapaneseIME

Keep

KeyChain

LiveWallpapers

LocalContacts {?}

MyXperia

NewsWeather

OMAClientProvisioning

OmaV1AgentDownloadServices

OmaDownload

OneTimePassLockScreenApp

PartnerBookmarksProvider

PhotoSlideshow

PhotoTable

phone-usage

PhotoWidget-release

PMSserviceTrigger

RecommendationEngineExtension

SemcCamera3D (Panorama)

SEMCFacebookProxy

SemcMusicVisualizer (If you doesn't have a Stock Music)

SemcWarrantyTime

SimCardService {?}

SmallApp-Calculator (Weight more than a 29kb Calculator)

SmallAppManagerService

SmallAppsFramework

SmallAppsLauncher

SmallApp-Timer

SmallAppWidget

sneiaccountmanager

SocialEngineCore

SocialEngineFacebookPlugin

SocialEnginePicasaPlugin

SomcCameraFaceRegistration

SomcCameraWidget

socialife

somc-get-more-release

SomcMovieCreator-release

SomcMovieCreatorRmm-release (If you have a KDEnLive: You can Remove)

SomcPhotoAnalyzer

SomcPodcast

SomcSketch

SOMCWebPlatform

SonyEntrance

Stk/SmartcardService

Tasks (Nothing important)

talkback (I was be thinking that a Samsung will be has a useful crap only...)

TimeShiftCamera

TopContactsProvider

TopContactsWidget-release

TouchBlock

UpdateCenter

usb-mtp-backup-transport

usb-mtp-factoryreset-wrapper

usb-mtp-marlin-wrapper

usb-mtp-update-wrapper

usb-mtp-vendor-extension-service

WeatherWidget-release

WikipediaPlugin

WorldClockWidget-release

YouTubeKaraokePlugin

YouTubePlugin

VpnDialogs

/vendor/overlay:

com.sonyericsson.trackid-res-305.apk

overlay-semcalbum-flickr-on.apk

com.android.providers.partnerbookmarks-res-305.apk

SimpleHome-Overlay-270.apk (Simple Home Laucher)

com.sonyericsson.customization.presetcontacts-res-305.apk

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Absolutely useless:

BasicDreams

EnterpriseService

HoloSpiralWallpaper

Newsstand

NoiseField

PhaseBeam

retaildemo

SemcEmail

SemcMetadataCleanup

SimpleHome (Launcher)

sonyentrance2-release (What's New)

Theme001 - Green

Theme002 - Orange

Theme003 - Red

Theme004 - Purple

Theme005 - Blue

Theme006 - Silver

Velvet - Google Searcher

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Can caught from Download:

Books - Google Play Books

Chrome/ChromeCustomizations - Google Chrome

Drive - Google Drive

Facebook - Can be download of "Facebook Lite" or on to "Browser" instead - It's a main Reason of "Lags" after Update of Newest Version of Facebook when Remove could be help to Return Functionally. {No Pic filters then No more Promote Stock.}

Hangouts - Google Hangouts

Gmail2 - Google Mail

Maps - Google Maps

Music2 - Google Play Music [UI it's a like as "Spotify",not at Music Player - when AOSP does be better performance']

PlayGames - Google Play Games

PlusOne - Google+

Videos - Google Play Videos

YouTube - YouTube

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/media/audio/alarms:

Remove all except of "alarm.ogg" and "Hassium" (But if be want: Alarm_Beep_03.ogg|Barium|Xperia)

/media/audio/notifications:

Remove all except of "Argon" and "notification"

/media/audio/ringtones:

Remove all except of "Orion" and "Xperia" (But if be want: Cassiopedia|Pyxis - or will be looks good: Breeze)