I'll agree that warriors/rogues get screwed by not having stamina potions wereas the mages have the lirium potions that they can pop one right after another. They probably should have fixed this by saying that if potions are used too quickly it will cause adverse affects (after all, lirium screws up normal people in the story. "Enchantment!") and therefore put a timer on them.
But dps isn't nessacarily broken. I can't speak for other classes, but I've got a 2H warrior that does 65-90 points of damage A HIT! With crits, it's up to 90-120. Plus stun abilities and an AoE that hits every around me AND stuns (2 hand sweep). My stamina pool isn't great, but believe me, even in beserk mode it replensishes fast enough and has caused me little if no problems (there was one time when I pulled one mob, had another matterialize behind me, and a third mob of shrieks unstealthed right afterwards, but that was the only major case). Even Shale, my tank, can do ~30 damage a hit.
So while yes, mages may get some benifits that OP them, melee for me is holding it's own quite well. Oh, and btw, I'm only level 14. I've still got 6 more levels to increase my attack and completely cream everything that comes my way.