OMG A PICKLE

Wouldn't 343i just use the same control layout from past halo games, instead of making their own?

Alright, as with halo 3 I absolutely loved bumper jumper, because I would only have the hit "x" rarely. But with reach I can't use the AA's (especially the jetpack) effectively because I can't look and use the ability. So I was wondering are the control layouts gonna be the sme as reach for AA's? How hard would it be for 343i to add the ability to make your own control scheme instead of making you choose one of theirs? Sorry if there already is a topic on this I just skimmed through all the topics.