The problem I have with Master Difficulty in Skyrim is enemies do 2x the damage and you do 1/2 the damage, which isn't that much compared to the 6x and 1/6x you had in Oblivion. Would make optimizing enchanting/smithing/alchemy a requirement basically to do well on Master instead of outright breaking the game
but, at lower levels, besides better ai (which i would never hold my breath for) what would you do? you can't enter new high level characters, though, sub categories of low level seems obvious to me.
it comes down to ai. and i think beth is one of the worst, but, has got the low level master stuff right. and, that's it.