OKAY, how bout this. They had classes in EVERY other TES game and people enjoyed in well enough. Had it until Skyrim. They just wanted to dumb it down to appeal to the casual COD-type gamer. Its the same reason why I can be the master of the Mages College without casting a damned spell. They just dont want the player to be required to think. Same with classes. "I pick up hammer...smash stuff...level up..."
It was like that in Oblivion, remember? Only Daggerfall and Morrowind had skill requirements for guild advancement.
But yeah, it is simplified for the masses. Less spells, less types of weapons (what happened to shortswords?), and so much more removed. I've got 4 or 5 magic overhaul mods, and it's still not as fun as magic in Morrowind was.