TL;DR version:
+Grenades are no longer tied to the weapon list. They have their own UI element and are switched to with the 'Grenade/Ability' weapon. Default is 'X' [ala Tac-Rifle]
+Grenades are more affected by veterancy
+Frag Grenades actually work now
+AutoRifle and Tac-Rifle have appropriate vapour trails and sounds when hit-scan now.
+Added spread to sniper rifles out of scope