The level sync system is already in the game so it's not like they'd have to come up with anything new, other than to give players the option to level sync on command. There may be some issues to clean up, such as entering a F.A.T.E. while already level sync'd but I imagine that could be solved.

As for folks asking what's there to do or what's the point - it's entirely whatever folks make it to be, much like having an apartment or hosting a venue. I don't imagine this is a big ask or even a big undertaking to implement but a feature I would've enjoyed seeing even as far back as ARR.