I dont really agree with the 1st con being a thing. Youre not gonna find many people leveling for the first time for one thing. For another, if they are leveling for the first time then they would likely be intimidated at the thought of queueing up for a dungeon with random people.
Its funny to me that people bring up the teleportation as a negative. For 15+ years Ive literally got summoned (a teleport) or pointed my mouse in a direction and auto flew.