Well FWIW although there clearly seem to be some improvements, it's certainly not running perfectly on our system (8 Core Mac Pro, 8GB Ram, Logic Pro 7.2.3 etc.).
It does seem to load without some of the issues I was seeing previously (spinning beachballs of death, no connection to server etc.) which is definitely a big step forward. However, even with just 3 matrices loaded if I record even basic automation in Logic (simple volume fades) I get choppy audio as a result. After a while I exited Logic and immediately got a Vienna Ensemble crash. I'm happy to post a crashlog tomorrow if it helps at all.
I'll try and keep testing it further tomorrow and don't want to be too down on this release - I've no doubt the VSL guys have worked hard to make improvements - but there still seem to be some issues.
Regards
Jules