The problem with that view, is that Linux distributions are free and maintained by a lot of people in their free time. (Yes, and many companies as well.) Your solution has to come in some form of contribution, and it has to be specific. The best thing would be artwork, code, etc. Even if all you can do is E-mail somebody who actually works on Ubuntu, and let them know what you'd rather have, I think that would help,…
I think that part of the ugliness comes from having so many contributors and a culture that is used to things not having a consistent look and feel. On OS X almost all native programs look and feel the same way and the frameworks and tools encourage developers to follow Apple's human interface guidelines. When someone uses another toolkit, such as Qt, the apps just don't feel right. On Linux there is not single tools…
The UI is the API that users work with. Inconsistencies are frustrating.