-A [b][i][u]NEW[/u][/i][/b] engine -Actual servers -No peer to peer -A completely independant sandbox from PvE -An actual MMR system so this stupid CBMM v SBMM crap can end -Region locking -Maps that arent just 3 lanes and arent just mirrored with slight variations -Perk balancing -Weapon balancing -Armor balancing -Super and ability balancing -Play testing -Map voting -An actual loot pool -A map pool with more than 4 maps in rotation -Quests/triumphs/ect that dont force you to go against your fellow team mates just to complete them... just simple things that most other devs have figured out by now. Basically if ANYONE at bungie thinks its a good idea, do the opposite. NOTHING bungie has OK'ed since activision left has been the right decision. Better yet, just outsource the work to High Moon and Vicarious Visions and let them do it.