I think it's pretty silly that you can't lay down. Pretty much the only shooter that you can't.
Shouldn't need to explain the benefits of being able to lay down.
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Okay you expect to see a warlock,hunter,or Titan laying down. That would look silly and be annoying as hell. Your trying to recreate battlefield and cod in a Halo like game. STOOOOOOOPPP!! You can go prone all you want in aw and hl so be happy with those and leave Destiny FOREVER!!!!!