I agree with you on most points.
RE: the Assault stim, I think it should be completely removed from the game. It does nothing to bolster the Assault class's identity. I made another post outlining my problems with it, and offering the replacement of a secondary non lethal grenade type instead, and a boost to objective capture speed for the player and nearby allies in place of the upgraded version that comes as the active ability for Assault's field spec. That post can be found here, if you want to check it out:
https://forums.ea.com/discussions/battlefield-6-beta-feedback-en/assault-class-stim-doesnt-contribute-to-its-identity-here-is-an-alternative/12481184
