I dont believe this will be enjoyable because you join the server for competing each other in a 1v1 arena and show who is the best in the server.If everyone invites each other for private 1 v 1's what is the point when only 4 people will be normally playing?
out of context. The players will mainly be playing how it currently is, this is only adding the option for a challenge request if you wish to go head to head against a specific player.