Suggestions for the new version of Copernicus. These are obvious, but perhaps worth repeating.
1) We really need geometry rasterization with a soft alpha channel edge based on the pixel/voxel fill rate of the passing edge, similar to antialiasing. Currently, rasterization is very coarse, requiring quadruple resolution and then resampling, which becomes very slow if there's animation and you want a resolution greater than 1k. And without resampling, it looks very sloppy.
2) We also need a separate node for FXAA.
3) We really want convenient use of raster and vector masks. Using Texture Paint SOP is inconvenient; you have to jump between contexts, create two screens, draw in one, look in the other, and try to hit the right spot. The same goes for vector masks from Curve. You have to do it through SOP with two screens. It's very, very inconvenient. I'd like to take things a step further and create masks directly in COP, preferably over the visible source.
4) Choosing fonts for text. Copernicus is so good and begs to be used that the lack of a font preview is a pain.