I think that when you talk about possible shakeups for the MMO genre you have to keep in mind the very limited time most people have to play games. Coupled with that MMOs naturally are very grindy innately. It's kind of important that people don't saddle a new game with too much. When I hear about what people seem to think we need to do it just doesn't seem terribly realistic to expect a large playerbase for that kind of thing.
The "people don't have time to play" mmo excuse to push for an arcade-like experience should not be taken seriously by game devs. People DO have time, they just don't have time for games like Blade and soul where the gap between fresh new level cap players and players who have been at level cap for 6 months is astronomical; and thus the 2 groups will never get along.
It's not so much about having time or not, it's more about how you handle end game in terms of progression. Grindy f2p players handle it different from p2p games where the game design is created to create a fun situation at end game. It's 2 very different philosophies.
Just want to clear that lie that people don't have time to play games.
How much time are you expecting people to put into an MMO? Bearing in mind other responsibilities like work, chores, so on and so forth. Not even counting other things you want to do for fun. As is, even with a boost, I've had a hard time catching up to XIV to where I'd like to be, and that's cutting a huge swath of things out.
I would LOVE that as the Ivalice Alliance team made some of my favorite games, but honestly I see more of a world system like the original Kingdom Hearts where they can show off other parts of the franchise. I wouldn't mind that either, tbh.