I feel like this should be something obvious, as the ease of support removal is relative to the difference between the nozzle width and extrusion width.
If you have a .4mm nozzle but are running a .48 or higher extrusion width, you are in for a bad time removing support. It would be nice if I could control the support interface layers directly (the layers ABOVE support) to get some better removal characteristics.
Additionally, I think we need to petition to remove percents from certain area's, specifically first layer extrusion width and infill extrusion width, at a minimum, show the result of the percent calculation in a box next to the percent fill window.