And the Cycle continues...
Morrowind was too easy past level 15.
Oblvion was too annoying with high level enemies.
Skyrim strikes a miidle ground, but not yet perfect.
I think it has improved with every game though.
Morrowind's system was pretty bad, but to suggest that Oblivion's
terribly thought out level-scaling was a step forward is a bit of an overstatement.
Skyrim definitely improved on things as a whole, since it seems to have adopted Fallout 3's way of doing it. the other reason I imagine it's not as awful as Oblivion's implementation is due to the advancements they've made to the combat, as the unbalanced "stagger" system in Oblivion matched with it's inability to differentiate between if you're blocking or not, made the level-scaling damn near unbearable (in fact, it
was unbearable for me as this is the sole reason I've stopped playing it).