Id argue a big problem with how rogues and other physical damage classes are right now is due to how combo oriented combat has become. It has become more efficient to burst people down one by one than to take on everyone at once. This ties into a prevalent abuseable strategy that involves using skin graft +adrenaline, refunding your ap with kills using the Executioner talent, and escaping with chameleon cloak. Basically, rogues are the best at abusing this strategy and with how cheap some of their skills are (1 ap for 2 attacks with throwing knives), its no wonder theyre op. Meanwhile, mages have no weapon scaling on skills, no crit multiplier due to relying on spells, and long cooldowns. Even with aoe, being able to kill someone in one turn is more useful than spreading out your damage.