You mentioned
For avahi please read this and also look in the archived forum why is not possible to be removed:
v4l2 - is a requirement for ffmpeg
and a make depend for qt5-base
yakuake - is a 1,8 MB - mostly useful if Plasma crashes but yakuake works, so you don’t have to switch TTY
gsmartcontrol - is only installed in Gnome and Xfce editions
People that migrate from Windows or MacOS do not know what to expect, and don’t know what the above packages do, so, with or without them, they will still have to test at least a Live Session.
Also, how those packages influence Manjaro popularity?
Thanks for your feedback.