Halo fans coming into this expecting anything Halo-like from the multiplayer are going to be massively disappointed I think. Best to keep expectations in check and realize this is gonna be a whole new ballgame for better or worse.
I know, I know but goddamn, I just can't help it. I really want another multiplayer game like Halo 3 or Reach.
Though the physics engine was a big part of the mp experience for me, and it seems Destiny has the same kind of everything affects everything stuff going on so I'm hopeful.