you never got too powerful in Oblivion though because of the level scaling, ...
Yeah, and it was terrible.
If you first invested in some fight skills and later increased other skills you actually felt like you'd get weaker by leveling up. That's really the worst case, and I hope it will never be repeated.
I feel its not a good game if I cant be a Demi-God after 200 hours of play.
I like the sense of progression, I like dealing effortlessly with enemies that once gave me trouble.
Yeah of course ... and after 200 hours, if you are maxed, it totally makes sense to be strong.
But what's not good, if this happens too fast.