I can still measure a small performance hit from X2 to X2a, and still see various quirks, some of which I still curse at, but I'm at least able to use X2a. I just have to open a whole new session/template for each take of a song to keep X2a from dropping out audio during recording.
I wish I could have had the X2a patch without "new features".
The winds aren't strong, but I'm sailing.