I read all these people complaining about slow load times of 1 min. I would love a 1 min load. I think it just took about half an hour. And VSL Ensemble crashed about 25 min in. I have Cubase excluded from Windows Defender. I’ve tried to only load the VST 3/64 bit versions of all my plug-ins. It is so slow. Any suggestions?
The most likely problem is probably a VST issue. I see you somehow only loaded VST3 64 bit ones but have you done the systematic procedure for checking each VST for issues? You may have seen this KB article but, try the procedure outlined in the “Solving VST Plugin Troubles” paragraph. Good luck. 
Regards. 