Agree on the throwing knife but thats the gatget they gave recon which should be open to everyone (player choice). The throwables agree too but I think is better then what they currently have since they took smokes away from everyone but support.
For engineering I wanted to be in general for vehicles so slowing them down and blocking health regen seems to much as is not to mention stingers tend to 1 shot kill air units
I'll rework support, it was a last add on but you are right. Was trying to keep most things as they were but less is more at times
Assault, wasn't sure about quick recovery since most don't like not being able to recover and support doesn't always do his job but you are right. Ill re check
All classes can Hold breath but has a higher purpose for recon as it activities the sweet spot mechanic. This would allow for happy trigger players to still fire at will but also allow more patient players to get the sweet spot benefit for being scouts and pick their targets for a I hit ko to the chest instead of shooting anything that moves