Does anyone know when grenades are actually thrown?
Seriously, who cares? That's something that
can wait until you get it. (Also, there's what someone else said about cooking grenades by holding it, but yeah, it could still be releasing a 'grenade button' or holding the 'grenade button' then RT, I don't know).
Anywho, this vid was another piece of the puzzle explained. I like the aesthetics of it. Except it didn't talk about icons or outlines for players or objectives that are dynamic to them, as opposed to the strict HUD which is always in the same position on your screen no matter what. Those are the things that would get cluttery, I suspect. If there aren't HUD customization options then custom HUDs will come out sooner or later. ^_^