Hi, exactly the same here. VI Pro works fine.
I have two studios that are mirrored (same Macs, same Osx, same apps and plugins) in two different locations. In the one without update everything works, the other, as you said, is pretty unworkable. Both with Sibelius and Pro Tools. I've done a "rollback" to the previous version (from Vienna Assistant is possible) but the issue persists. I contacted the support but other than advising the rollback procedure they didn't support me too much. This issue stress me a lot and I hope in a solution asap.
Best