You need to add another co-op mode. My friends and I loved both firefight and spartan ops. After campaign there’s nothing else to do co-op and don’t get me started on warzone.
I would like to see a PVE endgame myself. I’ll end up playing arena and warzone I’m sure (I play all aspects of Halo)… But it’s nice to have a chill mode to play with my friends who don’t quite like the competitive stuff quite as much.
Spartan Ops was not very popular so they canned it as it was supposed to have more seasons. And well Firefight can get extremely monotonous as well