I do agree that to much customization isn't good either, it can create chaos and distraction to what is actually the point. But 2 or 3 themes can already make a big difference.
The link i shared is indeed not a complete UI, but it is just to give an example of what i mean. I just think that it could give an extra touch that makes me love to use AD / AP even more :)
On my laptop AD runs really smooth (better then Illustrator or Photshop) and at the end thats the most important part. I will patiently wait for 2.x. and in the meantime i will deffinitly keep on using AD / AP :D