now i know this isnt what u want to hear but, the mcu by itself isnt that useful as a plugin controller.
i use mine in conjunction with the C4 which is designed for controlling vst and vsti.
with the mcu you can control four bands of eq, pan, input, output, send levels, pre, post, phase, etc.
it has great transport controls and lots of useful buttons with the sonar overlay.
if u want to control your plugins and soft synths, the C4 is THE BEST because the display shows the current parameters and values. it automatically maps all vsts.
i love it. if the prochannel could be controlled with it, i would achieve ZEN.
hope this helps, even if its not great news.
also, i hope someone smarter chimes in and proves me wrong!