Hmm, I like the update, but don't really feel too great about it being supporter-only...
I like testing pre-release programs and games and giving feedback, but why should I have to essentially pay to do this (I know it's technically "donating", but if my only intent is to test new features and give feedback...)? I like donating to projects that I find are pretty awesome; osu! was actually the first game I donated to without caring about any of the supporter features. Just hate feeling like I "have" to donate (or essentially pay is the way I look at it) to do something, especially something like testing pre-release software.
Just the way I feel about donations I guess. Can't non-supports just be able to use the test client, but not have score updating? Or maybe use the system that existed before where you could make a 3-hour (or so) temporary account for the test client?