lxterminal: do we need this ? even octopi is compatible "qterminal"
How ? I can't install octopi without lxterminal. It serves only to that.
Too much lib32 libraries, maybe it's a manjaro thing ?
No, but each time you use a 32 bits application, you get some.
Qasmixer & pavucontrol : maybe you have to choose to keep just one, i vote for qasmixer and the removal of pulseaudio
Qasmixer is there to resolve a problem with the volume applet, it will disappear. For pulseaudio, I can't have sound without.
ScreenGrab & Lximage screenshot: same
True. But screenshoots can't select an area, I think.
Qmmp & cantata: same thing, i vote qmmp or clementine, cantata is for more advanced users who can install it easiely after
qmmp causes a problem with Chromium : so, nice, but probably to remove. I search a very light player, cantata is too complicate for casual user. I don't know if I get Cantata or not, only few users need a music "manager". Deadbeef-qt is on my list of possible (seems have problems with flac).