Would this be fun and make the lower level content enjoyable and allow for jobs to use what feels sometime like mandatory skills at levels they don't have them? Yes. I'd certainly love it and prefer it. But can you imagine being a sprout, first ever dungeon in Sastasha, and you get 3 level 80s? Sure they're synced down, but the dungeon wasn't designed for so many skills and it'd feel pretty bad for that sprout. They'd very much feel like a dead weight being dragged through the dungeon.