While perhaps not the most necessary change in the world, it does seem like the draw tool should only draw in the selected area when a selection is made.
This would be handy if you just want to, say, highlight a single peak and draw in a different type of curve to replace it without affecting the audio before or after. Yes, you can do it already just by only drawing on the peak, but this would make it easier and would help guard against mistakes.
If we were to have that, I would also want an “Interpolate” submenu in the right click menu with the obvious Linear, Logarithmic, and Exponential options. This would interpolate the selection (or the whole sample if no selection was made) from the first sample to the last.
That would be the shit. Perhaps the current “Smooth/Interpolate” options could be part of this submenu as well. I’ve started another thread for this, as it is a separate feature suggestion.