I would love an option to use nearest-neighbor scaling when Liquifying to avoid adding more colors to the layer. This would be very helpful when working on flat-colored drawing or animation layers that have no anti-aliasing. That way I can liquify certain layers while maintaining the strict color palette.
Liquify with nearest also helps prevent your sketch from getting blurrier over time as you liquify it, at the cost of some jaggies.
I also highly support this feature request to add a similar feature to freehand path: Making an option to disable anti-aliasing for freehand path tool
Hopefully these aren’t too much trouble!
Note that the second one can be worked around with a custom brush, but having it built into the tool is much more convenient for keyboard shortcuts.