you can already sync your level to (technically) anything you want, i t's just not exactly convenient right now. I'm all for letting people sync to an arbitrary level so you don't have to have someone with you at the desired level.

It really would be the simplest way to let people play the way they want. Something FFXI has always been good at doing (hey look at me with my fully upgraded Claustrum being swung around on SMN! )