Up until level thirty I had to use a wide assortment of spells and potions to complete a dungeon or even a single battle. I had to frenzy targets to attack one another and raise zombies of fallen enemies to fight while I stuck back shooting with arrows. Whenever I got in close quarters battle I cast a stoneflesh and hack and weave with my dagger. I only used potions for healing. I had to be tactical for every battle if I wanted to survive.
At around level forty no new enemy types appeared so I just continued getting stronger and battles became less epic and tactical and more hacky hacky slashy slashy. I could plow through enemy groups with barley using any resources or tactics so the fun of playing that character died down. I plan on finishing the character but now I don't care as much for the missions or exploring as much as I did. Until level 40 master is great fun, but I want Master to be a challenge all the way through not just for the first half.
More enemy variety in existing groups (bandits, vampires, falmer, draugr) or some new enemy groups entirely that are harder to fight (not just more health but how they fight [spells, weapons, items, etc]) could make Master a continuous, fun, and tactical challange. I am hoping DLC will create some new fun situations. Anyone else have an opinion on Master Diffiuclty?