You don't need to phrase it like that. You could call it "Create Season 2 character" or "Create Hydaelyn vs. Zodiark Arc Character" etc and instantly you've just given the player a lot more agency as to how they want to go about things. Give a description of what each Season is about, and let the player decide what story they want to play through.
And also yes, there should absolutely be more level 90 battle content but to reduce things to just "more raids!" is not an honest way of engaging with the sentiment. Right now there's basically raids, 3 dungeons (none of which have any glamour worth grinding), only 2 ex trials (one of which is literally just hideous accessories), and treasure maps. The options for what battle classes can do at the moment is significantly reduced compared to how varied our options were in say 5.35.
I thought Bozja was fantastic. If it were possible, I'd love to see zones like that release in the .1 patch if not with the expansion itself. You don't even need to attach a relic weapon to it. Just give me some different currencies or experience and I'm good. As someone who started in ARR, my interest in roulettes has diminished over time and I find the current max level gameplay more enjoyable. Thrusting Ishgard Restoration upon us with as much force as they did in Shadowbringers was a mistake.
I am in support of whatever provides the most convenience. I do not believe that the option to skip the story or to start at a later point cheapens it in any way, and am unlikely to be convinced of otherwise. It's like asking whether I'd like to play Assasin's Creed Odessey or Assasin's Creed Valhalla. Same "world" and gameplay essentially, just a different story and set of locations. The most player friendly option is to enable them to begin at their desired point, whether through a skip or the creation of a Season 2 character.