It's not possible to please everyone when you do a UI change and have 300+ million users, but we do try to fix some issues people have with the new design (e.g. setting for text buttons, high contrast theme). Of course it has to look consistent with other products so there are some limitations.
Our community manager wrote a much more eloquent answer to that topic on reddit:
http://www.reddit.com/r/google/comments/sk7i7/how_do_you_get...