Well yeah, if you don't watch a lot, then you aren't going to notice some visual inconsistencies and/or make a big deal out of them, especially if your only other regular experience with the medium is a long running shounen with poor production values.
Still, I doubt you'd find a ton of people that would consider this some kind of visual revolution in the medium. For something like that, people would point more to something like Hyouka or Tsuritama as recent examples. Of course that isn't necesarily a deciding factor on how good something is. I like AoT MUCH more than either of those shows. And hey, to each their own, and I personally agree with you that the art style is great. Not my favorite looking anime ever, though, but it's at least got visuals I'll remember.