Well I have started a new character, a melee class and though I found Mage quite easy, I expected that, as people said that the game favoured classes Mage > Ranged > Melee, but I am killing stuff much faster with melee (so far anyway), compared to my experience as a Mage.
Of course this could also be due to the fact I am more in-tune with the games mechanics, but it does seem easier so far.