I’m not against difficulty increase, if it was actually a difficulty increase instead of simply buffing HP and damage until the dungeons become unplayable.
If you are really trying to defeat grinding as you are claiming you are, why not change the amount of tokens required for an armor set? Make it obtainable in 10-15 dungeon runs. It doesn’t stop it from being a chore, but it makes easier for everyone to pretend it isn’t.