The thing that bothers me about your reply here Dax is one I see many many times about Halo. The people that truly love Halo don't ever want to see Halo evolve with the times. Does it need to be like MW3? No, of course, not. It needs to be Halo, but it also needs to be a 2012 first person shooter, not a 2001, or 2004 shooter with a new coat of paint.
Sprint for everyone (if that's how it works) is something I have wanted since 2, because casually walking around a map seems slow and unbecoming of a Spartan.
The perks, well it's just too early to tell because we literally know nothing of them.
I just want to see Halo take some of the good things the FPS genre has created since 2001 and implement them while keeping to the Halo structure. It seems all the negative opinions I usually read on Halo are summarized as "we want Halo 1 HD or Halo 2 HD, not anything new."
More a view overall, and not specifically on what you said, but what you noted brought it to mind.