Just an achievement synch would be good enough for me. Making combined progress on things like S-rank kills and achievement FATEs would be nice, as would bring able to reclaim past event gear from the Calamity Salvager for any future characters.

Though perhaps it would also mess with the ability to replay those events in the first place? And an optional synch would be getting complicated.


Also I can definitely relate to the issue of not wanting to delete a character even if you don't play them. I have an abandoned Lv10 character that was my first entry into the game, before I decided I wanted a different character design. I never play as her, and it's a server that would be a good choice for starting a new alt on... but I can't bring myself to delete her.