I'm working with pomelo to sort out the problem he's having. For some reason, the JSON returned from his sgminer API doesn't match what my local sgminer returns. The issue should be resolved soon.
This is amazing!
Are you planning to add more settings to it? (Intensity, xIntensity, threads, etc.)
Adding more settings wouldn't be difficult, but it depends on whether you would want to test those settings individually or together with GPU clock. Individually is doable, but if you want to test multiple settings in the same "batch", the amount of time the application will need to complete the test will multiply with each setting. I think, before we add any new settings to test, we need to figure out which ones make the most sense in order to relatively quickly find the hashrate sweetspot.Are you planning to add more settings to it? (Intensity, xIntensity, threads, etc.)
able to port it to linux? this looks amazing! If you aren't able to port it, hopefully someone can join your github team/fork and make a linux port! 
It should run on linux right now provided that you have mono installed. If not, I'm pretty sure I can fix it. Making it run without Mono means rewriting the application in some other programming language and that's not something I have time for at the moment.