I never understood why all throughout 1-50, all of the dungeons have a very small minimum and maximum level range, then you reach level 50 and suddenly there was no max at all. Even now with the ilvl sync, the gap is huge, and, as the OP says, pretty meaningless. We still overgear the content so much that we just blow right through it.

I'd maybe say stricter ilvl sync and increase rewards, but will this even make the dungeon more fun? Probably not by much, if at all. Maybe for new players.