If you got to be really uber powerful destruction mage on master difficulty, the game would be a light breeze for a mage on this level, and there is nothing he can do other than to pretend. As a level 53 archer/warrior build on master, almost everything is easy as hell, and yet there is the occasional one shotters that take me out in a single blow. Ancient dragons and powerful mages can kill me easily if I don't use other options available to me as well to assist my skill as a swordsman. And personally I think the archer skill is a bit too powerful, as mages with their distance fighting is about the only thing that can harm me before I've killed them all off.
The difficulty setting is there to be used so everybody can have a great game. If you want to play pure anything, learn to adjust it. That way mixed classes don't get overly powerful with nowhere to go (which I think is already happening to my build). If earlier TES allowed you to play pure anything at high level with ease, I'm calling that bad design.
No, it's broken. My warriors/rogues don't need to change the difficulty why should my mage? (They clean house, without exploits!!) Their weapons level, and mages don't maybe? They also continue to hit when stamina hits 0, mages can not cast spells (or "use their weapon") when mana runs out.


Fine, your just a mage then, not pure mage.