I'm loving the multi-player idea. There are games I want to be solo, like Uncharted, or Batman AA. However I can see this being a massive war, lasers everywhere, and being able to go single player or multi without it ruining the experience. It's not like Resident Evil 5 where I complained that multi-player could take the scare out of it somewhat since you're no longer alone.
Tho I do want to stress, that that only extends to liking multi-player as long as it doesn't hurt single player. Especially if bosses become too easy with multi or too hard with single. If the game becomes unplayable when playing alone, yeah I'd rather multi-player be left as nearly a seperate entity with capture and death match. I don't think it will tho, IMO, co-op in something like this is a plus. Being able to be Prime, and having someone else as Iron Hide, and someone else as...let's say they include Ultra Magnus, and us gunning down everything, awesome.