Not sure how raising the level for the maps without changing the rewards would entice any one into doing them. If anything, it would make them even more unpopular because you need to put even more effort into them but for the same old rewards. The maps are fine and should stay low level so people can just solo them for the old rewards same as they unsync old dungeons. It's the Aquapolis and Canals that desperately need to be unsync-able so they can be solo'd. They're old old old content and no one is wasting their map quota on them when there are ShB maps and dungeons. I'm honestly amazed they still haven't added that option to at least Aquapolis by now. Not unsyncing Deep Dungeon? Yeah I can sort of understand that, but there is nothing game-breaking about allowing people to solo Aquapolis when they can already solo the map that leads to it.