Dungeon matching system appears to be working based on dungeon selected not your team rating

Knightarthus

It looks like the dungeon matching is entirely dependent on the difficulty selected and has nothing to do with your team rating ( aside from restricting some difficulties based on your rating). Can someone confirm? Also if this turns out to be the case wouldn’t be better if it worked based entirely on your team rating ? That way you can select to do an easier dungeon with stronger team without the risk of being matched with someone who can’t go too far.