I’m curious about your suggestion and trying to better understand what you are trying to do. I think Scaler might already do at least some of it.
Do you have Chords Only disabled in settings? If you do, you should be able to freehand any key combination and Scaler will apply current performance settings (rhythm, timing, etc). I’m not sure if this is what you are thinking about, but I do it all the time…it is the main way I use Scaler. You can play Scaler’s performances with no chords bound whatsoever, combine bound and freehand chords or augment bound chords if your timing is pretty good.
Understanding how Scaler does quantization is helpful and there are some other idiosyncrasies to work through with different modes and even instrument types responding better than others. However, there is a lot of flexibility in how Scaler applies its performance data that I believe goes untapped. There are a number of Play Quantize threads on the board that might help.
Let me know if this is in line what you are trying to do. I don’t think people explore the freehand performance side of Scaler all that much, so I’m always interested in those that do.