So much to cover in this poll, it's almost daunting.
Firstly, the Reclaimer Saga being changed is an indicator that we will be going beyond a 6th game. Will it always be Chief? It doesn't have to be but it would be hard to appeal to the masses with anyone else. Remember when everyone thought Locke was being brought in to take over as the main character and that 343 wanted to do away with Chief? It didn't go so well even with Locke being a pretty good character.
I would love to explore more locations and I'm sure we're heading in that direction since it seems Halo Infinite is giving hints that it could be open to exploration of a certain part of Zeta Halo. We can't be choosing between a good multiplayer and a good campaign anymore. Video games are difficult to make and I get that, but it's time to deliver. People are saying what they want, it's just time to make it happen.