[Sony Xperia XZ Guides, News, & Discussion] NagasakiGG:
Heya,

here i'll release a list of some stuff which is safe to remove.

#System-App
/system/app/com.amazon.mShop.android.shopping;
/system/app/com.facebook.appmanager;
/system/app/com.facebook.katana;
/system/app/com.s.antivirus;
/system/app/com.sonymobile.support;
/system/app/com.spotify.music;
/system/app/device-config-agent-release;
/system/app/device-monitor;
/system/app/fota-service;
/system/app/newssuite;
/system/app/phone-usage;
/system/app/photoslideshow-release;
/system/app/pip;
/system/app/playstationapp;
/system/app/talkback;
/system/app/videoplaceholder;
/system/app/videotvsideview;
/system/app/ar-effect;
/system/app/YouTubePlugin;
/system/app/YouTubeKaraokePlugin;
/system/app/YouTube;
/system/app/XperiaTransferMobile-release;
/system/app/WorldClockWidget-release;
/system/app/WikipediaPlugin;
/system/app/Videos;
/system/app/UnsupportedHeadsetNotifier;
/system/app/Theme-Sou-M-cid21-pink-sw360dp-xxhdpi-release;
/system/app/Theme-Sou-M-cid19-silver-sw360dp-xxhdpi-release;
/system/app/StyleBlue-release;
/system/app/StyleBubble-release;
/system/app/StyleDaily-release;
/system/app/StylePaint-release;
/system/app/StyleRed-release;
/system/app/StyleStar-release;
/system/app/StyleSunshine-release;
/system/app/StyleSuntan-release;
/system/app/Stk;
/system/app/SomcSketch-live;
/system/app/SomcPOBox;
/system/app/SomcMovieCreatorRmm-release;
# /system/app/PrintSpooler; - [COLOR="Red"]Don't remove! Or settings will be ****ed up and lags the **** out of it[/COLOR]
/system/app/Photos;
/system/app/PhotoWidget-release;
/system/app/OmaDownload;
/system/app/Music2;
/system/app/Maps;
/system/app/Lifelog-3.0.B.4.15-6295567-googlePreloadLive-release;
/system/app/IddAgent;
/system/app/IddPermissionApplicationCertificate;
/system/app/Hangouts;
/system/app/HTMLViewer;
/system/app/GoogleTTS;
/system/app/GoogleLyricsPlugin;
/system/app/GooglePrintRecommendationService;
/system/app/Gmail2;
/system/app/ExternalKeyboardJP;
/system/app/EditorsSlides;
/system/app/EditorsSheets;
/system/app/EditorsDocs;
/system/app/Drive;
/system/app/CrashMonitor;
/system/app/DemoAppChecker;
/system/app/CrashMonitorSystem;
/system/app/CrashMonitor;
/system/app/ClockWidgets-release;
/system/app/CalendarGoogle;
/system/app/BasicDreams
/system/app/AnonymousData;
/system/app/AdvancedLogging;
/system/app/com.sonymobile.androidapp.cameraaddon.stickercreator;
/system/app/wallpaperpicker-release;
/system/app/com.sonymobile.xperialounge.services;
/system/app/com.sonyericsson.xhs;
/system/app/experienceflow2livewallpaper-release;
/system/app/GetMoreClient-standard-release;
/system/app/Theme-Sou-M-cid20-blue-sw360dp-xxhdpi-release;

#System-Priv-App
/system/priv-app/usb-mtp-vendor-extension-service;
/system/priv-app/usb-mtp-update-wrapper;
/system/priv-app/usb-mtp-fotaupdate-wrapper;
/system/priv-app/usb-mtp-factoryreset-wrapper;
/system/priv-app/usb-mtp-backup-transport;
/system/priv-app/textinput-chn-xxhdpi;
/system/priv-app/sound-picker-release;
/system/priv-app/somc-get-to-know-it-release;
/system/priv-app/com.sonymobile.retaildemo;
/system/priv-app/com.facebook.system;
/system/priv-app/album-albumLive-release;
/system/priv-app/Velvet;
/system/priv-app/TimeShiftCamera-xxhdpi-release;
/system/priv-app/TagGoogle;
/system/priv-app/StylePortrait;
/system/priv-app/SoundPhotoCamera-xxhdpi-release;
/system/priv-app/SomcMovieCreator-release;
/system/priv-app/SemcMusic;
/system/priv-app/SemcCamera3D-xxhdpi-release;
/system/priv-app/OMAClientProvisioning-release;
/system/priv-app/GetMore-standard-release;
/system/priv-app/CoverApp2;
/system/priv-app/CameraWearableBridgeHandheldServer;
/system/priv-app/ArtFilterCamera-xxhdpi-release;

#etc
/system/etc/amazon-kindle.properties;
/system/etc/amzn.apps.ref;
/system/etc/amzn.mp3.properties;
/system/etc/amzn.mshop.properties;
/system/etc/amzn.mshop.windowshop.properties;
/system/etc/audible.param;

Either remove them manually, or with "rm -r", or with a TWRP script.