Thanks for the feedback on this. We haven't put any effort into the settings interface yet -- the one in the Alpha release is just a placeholder.
I'm actually developing on Mac, so Mac performance is an issue I am sensitive to. Right now I have a 2016 MacBook Pro as my primary development machine, and am using an early 2014 MacBook Air for testing.
If you don't mind my asking, what kind of Mac are you using?