I recently purchased Pianoteq 7 Standard and I love it! This is kind of a nitpick, but it would certainly be nice to have IMO.

I like to control as much of the UI as possible with my MIDI controller, it allows me to focus more as I don't I have to constantly switch back/forth between using a separate keyboard/mouse and my MIDI keyboard.

I love all the flexibility I have with Pianoteq and using a MIDI keyboard controller, except there's one small nag.

I really wish it would automatically display sections that are hidden when triggered by my MIDI controller. For example, on the UI there's that whole section on the bottom-right for Action, Mallet Bounce, Equalizer, and Effects. If I use my MIDI controller to adjust a parameter, for example Action > Damper Position - the UI doesn't react except I see a small tool-tip showing the value as it changes. Ideally it would react as if I had just clicked the Action button and display all of the actions, that way I have visual feedback and can see all the other parameters rather than have to remember them all. I think another good solution (that would probably be easier to implement) would be to show the parameter name in the tool-tip that displays the value when I change it, currently it just displays the value.

Here's an image that shows what I'm talking about:

Anyway, like I said it's nothing major and just a "would be nice to have".