I remember Arakis and I talking about this whole RP arena thing too a few months ago and I totally agreed with it. The thing is, if you make a RP arena, the RP will start to spread even more. Think, if all the 2000 RP people face no one but eachother, how will their RPs go? Obviously the better one will start gaining a lot of RP and the worse ones will start to go down. Same with the lower RP people, usually people with 1300 RP lose a lot but only to people like 1500 RP or more, what if all the 1300 RP people start to play eachother, then the losers will lose more and more RP.
Renaming the current Folrart to Lavato would be nice, since it's the "whole big world."
Also, another thing is that it would be nice to not make a viewing restriction like regus and crest. Whenever my low level friends are dualing in regus or crest, I'd always have to sign on my alt accounts to watch them. If a RP arena has that, then I'd have to end up forcing my alt to give up a lot of matches to lose RP in order to go view the lower RP arenas, and the higher one lol, that'd be even harder.