As someone who is just starting to play with TW and have started sharing the link around with friends, I think that the first major hurdle that TW needs to overcome is its design. The UI/UX looks like it was designed by programmers, not designers (I say that as a programmer myself, part of a team that has 40% just User Experience and Visual Designers).
It is, in my experience, when a professional designer takes wireframes (in our case, the app itself!) and does visual treatment that the apps suddenly gel and feel fresh and professional.
That applies also to the content on the homepage, etc.
Visual Designers have a different angle that even design-sensitive developers don’t. It’s the last phase that makes an app become a product.