For pros you need to update autocharge. You can throw nades while keeping the charge with autocharge. You can't otherwise. I personally love that. A frag grenade plus a strike rifle anywhere hit is an instant kill (<3 strike rifle)

Also i don't know if this is only for single player, but the deatomizer autocharge seems a little dodgy. Like when autocharged it will actually fire your charge after a second or two if you melee.
The invisible autocharges also only happens when you actually reload the gun, and while i have this unconfirmed for the deatomizer (which i think might always do it, it's a little strange compared to strike rifle and warp pistol), i can tell you that it only happens for the strike rifle when you don't have 6 bullets left in your clip, and the charge will not work as a real fully charged shot (nor will it take 6 bullets since it's faulty. It will only take 1) - thus no "mindgames"... Maybe with the exception of the deatomizer which i think always does an invinsible charge when reloading - and will act as a real charge when shooting.