I am using a new project from last week. I installed the update and opened it in Cubase as usual. The CPU in Cubase looks as usual (low).
MIRx is deactivated now. CPU at 98%. Right now, there is only one Room Tone activated (default).
VE is running with 12 Threads, Latency at 1024, Cache 4 GB. But that's the same as before. I haven't changed anything.
Cubase and VE are running in Multi-CPU mode. As long as MIRx is activated, even a buffer of 512 samples doesn't work. If I deactivate MIRx I can listen to the music without dropouts at 512, though the CPU is still at 85 - 98% (in VE)