The UI was fairly complete in previous betas, but it was also largely the same as the last major version. I don't think any of us know how the beta as it sits

The UI was fairly complete in previous betas, but it was also largely the same as the last major version. I don't think any of us know how the beta as it sits today is going to compare to the final release, but saying that it won't change because previous betas didn't change doesn't seem like a fair comparison.