Actually, just as an aside, this reminds me of a perfect recent example of how game "polish" is very much affected by the complexity and ambition of a title, and not so much by the often blamed developer skill. Obsidian was known for making fantastically ambitious and amazing, but also very buggy games. Then they made a game which is a "simple", straightforward Diablolike action romp, and it's almost perfectly bug-free for everyone on release.
Also look at Gothic 3 (and the subsequent downsizing in Risen) as an example. The more you try to do, the more things can go wrong. And sadly it seems like often it's not a linear function. Personally, even when I'm strongly affected by bugs (which I am not in the case of Skyrim), my opinion can be summed up as "a buggy, excellent game will be buggy for a while, a bland, unambitious and polished one will be bland forever".