Thus far, I do feel more powerful the more I level up. While raising non combat skill like smithing can increase the difficulty in hye short term, when I then honed my enchanted weapons into doing 150% damage every enemy became easier.
Also, enemies do not seem to truly level scale very much - basic bandit are now very very very easy to kill, the way the game balances this out is by introducing new classes of bandit which only appear past a vertain point. Logically, this means that eventually, once you have leveled past the point that the very strongest of bandits spawn, they will get progressively easier to kill, as they have no more massive stregth increases, and equipment increases are not too extreme.
Still, if you wander in the the wrong dungeon, prepare to be harshly punished. By aweful luck, I ended up fighting two Draugr Deathlords (THE second most insanely powerful draugr in the game) in a row at just level 18. To give an idea of the insanity, they are only meant to spawn at around level 40 and they have 1300 hp. The ebony weapons they dropped once I finally killed them were most appreciated though.