Hmmm well yeh I guess I agree that the things like bubble shield, jet packs etc are unnecessary when it comes to multiplayer, but they are in the campaign so I guess they felt they needed to integrate them into multiplayer. It does not 'break the game' though lol, that's pretty harsh.
It really does with how people use it.
I want a shooter to be about shooting. Not playing cat and mouse with bubble shields only to get wrecked by a guy coming from left field with a shield drain. The devs changed the game-play of halo's multiplayer to be more casual friendly and it shows. It's the same thing that happened in Black-ops that killed the CoD line for me.