yeah, rogues suck to have on you.
here are some tips though, with peels from another class, make sure you have fade glyphed and talented so you can pop off their slows quickly when you get a chance to get around a corner. Also the 4pc mooncloth bonus is vital to kite melee, i can kite a warrior all day long now, it's great! Plus don't be timid to blow trinket on a full kidney if the comp is healer+rogue, because if he switches to your teammate, he'll have blown most of his cds and he won't be able to lock you down long enough. and if you have the mana, DP spam does a ton of dmg, but don't over do it, it'll oom you quickly.
(but i agree rogues suck in arena >:( they don't let you do anything)