I've skim read most of the points raised here and I think it only came up once - depth cued edges with line width?
All of the brush strokes etc can hopefully be done in other packages that are designed to do that sort of stuff but it would help if the make 2D had some options only really open to some programming tomfoolery rather than time behind the mouse.
Is it possible to set an option for depth cued edges which get thicker closer to the camera? It's basic technical drawing stuff that some of us maybe did at school in the 80's and way way before... We already have line weights on edges (imagine a spider walking around your model, where it would disappear etc) but thicker lines closer to the camera would take it to the next level.
I envisage four variables - on and off and then the furthest distance line thickness (say hairline or 0.1mm etc) and then the line thickness closest to the camera (say 2mm or pt).
The output of which is curves with a solid hatch infill.
So as an example, if you're looking at the corner of a cube, the closest corner has 2mm thick lines and as the edges move away from the camera they reduce to a hairline - the output of which is a solid filled triangle for a line/edge/curve instead of a single thickness.
Like an IKEA v2.0 output.
Really happy with it so far, thanks for all the hard work!