Frankles said they've been nerfed... but I think most of us still wish they were campaign and Spartan Ops only. [/spoiler]They absolutely ruin maps[/spoiler]
From what I've seen they seem to raise players up kind of high, but run out of fuel fast.
Meh. I'd still prefer they weren't there or exclusive to SP.
First blemish on an otherwise flawless release build up.