I think will be good idea that add pvp in the tower where you can duel your friend to battle. Will bring more life to the tower and going to be fun testing ur skill we your friends and player
The PvP is made for you to get your asses kick... No need to see you make a shame of your self in the tower on front of everybody. Also, since you are surely a cheat using a auto modded controller and a switchlagger you may bring down the tower server down. So No! The Tower is a symbol of peace between all races and there is no need of more violence.