I just thought of an ability, “grenade return”. This would allow you to throw grenades back at the enemy before they get a chance to detonate. It’s simple, but I think the addition would improve the flow of gameplay by making the combat more fluid; by more fluid I mean people wouldn’t run away as soon as they see the grenade indicator, well most people would, but at least one or two heroic souls would try and chuck that ticking gift of doom back at the other team.
And get this I have a name of an achievement if someone managed to kill someone by doing this, “Could you wrap this for me?” 
So, what do you guys think?
P.S. Before people start saying I’m trying to make it like CoD, because I know someone would, I’m not, it’s simply a suggestion. Also try to remember CoD does have a few redeeming qualities; look at the person who beat the horse AKA Activision, not the horse itself AKA the game (Ex. any of the number of great franchises Activision milked including Guitar Hero, Tony Hawk, and Call of Duty.)