By that, I mean it has gameplay a lot like Reach (bloom, Armor Lock, AAs, Armor Lock, Sword Blocking, Armor Lock, No Alpha Zombie, Armor Lock, No Ranks, Armor Lock, Easy Double Melee, and finally, Armor Lock).
Those things are what killed Halo Reach for most people, and probably destroyed the series as well.
This is Bungie's chance to give the Halo series its proper 4th installment and not a huge disappointment like Reach.
What isn't remembered never happened. Memory is merely a record. You just need to re-write that record.