Random grenades is why I won't be getting this for multiplayer... My multiplayer skills generally involve cleverly getting killed off with no personal weapons but a grenade launcher, so I respawn with nothing but that grenade launcher. My tactics evolved around this coincidental pattern (it seems to repeat itself no matter what game I'm playing) so that my primary modus operandi is to charge to the sound of gunfire, shout a warning to my team, and start indiscriminately lobbing grenades into the fight as my teammates scatter. It's a great disruptive tactic that can turn the tide of battle, but only if my team has some degree of competence and is willing to put up with my limitations.
Most teams do not exhibit this sort of patience, so I'm getting this one for single-player gameplay.