Absolutely agree that something like this would be an awesome improvement. I much prefer twiddling physical knob to messing around with a mouse and a software editor but I do find it extremely difficult to set fine details with the current knobs as they are way too sensitive. On the other hand they are excellent for fast scrolling.
The knobs already react to how fast you twist them.
Not very well though 
I find them great for rapid scrolling but when it gets to fine tuning they are so sensitive I often feel like throwing something at the KPA
Fine tuning is generally unnecessary, though. If you're setting a bandpass frequency, for example, you're absolutely not going to hear any difference between 7kHz and 6,998hz.
But changing from 3/16 to 4/16 for delays does make a difference 
or setting delays in ms or tempo without using the tap button.
Even the delay settings aren't that critical. For years 375ms was my preferred delay time. Now I just scroll until it sounds right and don't worry about what the numbers say.
I hear you but it still shouldn’t be difficult to get specific settings if/when you want them.
Although the Kemper has helped me get rid of numbers OCD with delay times and frequencies, I fear the editor will bring all that back:-)
