it is completely useless as is.
Another thing which is just stupid is getting rid of any possibility to empty an automation slot.
EDIT again: today I have managed to hear all channels in the (3-instance) project. For this, one of my st. outputs works, not more than one, in an instance. In two of them it happens to be 7-8, the other 1-2. The Equalizer Pro in the integrated plugin blocks audio, in some cases (in one of them it absolutely does); this is definite. In some cases MIR instantiated on a ch. blocks audio, then it doesn't; this too is definite. The whys and wherefores of these, who knows.
What does "Disable MIR AU Plugins mean" or supposed to DO? Why would disabled plugins be a default? I'm on a Mac, as far as I know the MIR is AU, what isn't AU about anything unless I have specified VST. So my obvious assumption is hell NO.
If I have to un/reinstall VEP, which is all the time now, I wind up having to scan plugins which I don't need to do otherwise at all, in any way whatsoever. A GIANT TIME SUCK.