What you think about promeathean`s grenades?At least I think that they are basicly useless in campaign, you hardly even damage enemies with it, and killing is even less common. But I dont have live connection, so it may be different in multiplayer...
From what I have seen, it's basically used for taking down shields.
I'm pretty disappointed in what is happening around the Crimson map pack. When it first came out it was available for 0 microsoft points for everybody. This lasted for about a day if not more. Loyal fans who bought the Map Pass would have usually saved 5$ compared to somebody buying all three map packs separately. Now everyone who got this pack and then buy the other two will pay 5 dollars less than the Map Pack owners. Microsoft so far hasn't planned anything to make up for this to the Map Pack/ LE owners. Hopefully we'll see early access to DLC or something in the future exclusively for those people.