It would be very useful to have numerical values displayed for the mixer sliders and the various parameters on the Piano page in the CFX Grand VST.

e.g. most VST software displays them when you click or hover over the knob/slider with the mouse, or alternatively a box at the bottom of the VST which displays values for whichever parameter is currently being adjusted.

Ultimately you'll always need to use your ears to find the best settings for a given situation - but it just speeds up the process to be able to turn the knob and decide e.g. 2.3 seems the sweet spot, then compare other positions (whether it's totally different values, or just slightly above or below), and then be able to return precisely to the previous value if desired. 

Would be great to have this added to a future update - it's one of those things that wouldn't harm anyone's user experience, but would make things a lot easier for people who do like to dial in their own custom settings.