Hello, I played the game for over 500 hours, the game is nice, but after some point you want to do only monoliths to gain more favor and better drops.
My suggestion is to increase XP gain in dungeon to be equal of a monolith 300. This way people have more benefits of doing dungeon, I like soul fire bastion dungeon, the drops are good, however I just don’t want to go there because I almost gain no favor there. Then I have no use for keys, unless to upgrade legendaries.