I was kind of scared about this jump from 2.0.0.beta10 to 2.2.0.beta1 (2.1 stable was announced today) but actually it was just a breeze, pressing buttons from the admin interface and not seeing anything remarkable in the logs other that some gem not needed anymore etc.
I even wondered whether someone had upgraded in the meantime. I did check the current and new version available in the admin interface and I swear I saw 2.0.0 etc indeed, but didn’t copy the text or took screenshot, which now I kind of regret.
Anyway, the fact is that we are up to date, and a major version has been released with many improvements. Check: