To be fair, we do not know the full consequences that the events of Endwalker have had for the world and we could very easily enter into a new era of gods who "inherit the will" of their predecessors and in regards to the remaining world, it's unlikely that the WoL's existence is known to people in the New World or Meracydia. We are casting away the title regardless, so I also don't think it would be particularly relevant in the previous Imperial territories should they choose to send us there either.
Most characters from Season 1 have completed their arcs and again, would have little to do with the regions of the world we haven't been in. Whether or not we're friends with Aymeric would have little impact if we try to restore the monarchies of Dalmasca or Corvos. I also do not forsee us going to another shard anytime soon. When or if that time comes, it'll probably only require a few cutscenes' worth of exposition, which is little more than what we went into with for Shadowbringers and things turned out great in the end.
What exactly will happen in 7.0 remains unknown but we do know that we are starting from scratch again, as adventurers out to see the world in a position no different to how we started in ARR, except with better looking gear. The majority of Season 1's mysteries have been resolved, so new ones would have to be introduced and general concepts like the Void and the shards are not so complicated as to require playing through so much content to understand. As for the cast-I think the best thing that could occur at this point is that the Heavensward/FFXVI team comes back and writes the Scions out of the story for the next few years and replaces the party with more fleshed out personalities like Estiniens, Yysales, etc. instead of stagnant characters whose arcs ended and have no tangible goals, yet they remain for reasons unknown.