V40 nerf - will be a little sad that I can't use it effectively, but if no one else can either, then its fine. Just have to relearn nade arcs, though, since I am too used to V40s.
Flashbang buff? - I hope so. Finally I can bring back some of my old CS style bang and clear into BF. I did fine even with BF2 flashes, despite people complaining whole lots about its uselessness, so if BF4 flashes are even on that level, I am going to use it for assault class.
DMR buff - Oh~ yeah~ Not like I already don't use it. Bring on my preferred shooting style.
MAA nerf - I don't care if its ARM nerf. I never use that thing any way. My MAA is anti-infantry. LoL
Helo nerf/buff - Scout helo repair nerf will not hurt me at all (maybe a little) since no one really repairs me all the often, and I don't rely on their repairs. If my ECM runs out, I'm out of the combat zone and not returning until recharged. Attack helo buff is GREATLY needed. Its pretty much one of the most useless air vehicle in game at the moment...