Great UI, the idea of making it simple to mix without prelistening is good.
However song browsing is awful. Get rid of all this complexity and bring a simple iPod library browser like on Algoriddims Djay. Dont store tracks in the library, store only the analysis data.
For now its not really usable even for fun with a browser like this and imported tracks filling up your iOS devices drive... Again, Algoriddims iPod library support paradigm is the best, if you cant beat them, match them :)
Alexandros Roussos about Touch DJ™ Evolution - Visual Mixing, Key Lock, AutoSync, v1.1