I had some ideas to improve the mapping functionalities. Maybe they are already on your list but I couldn't find them around here.
- Copy x and y coordinates of slices and paste them in other slices, masks and crops (maybe cmd+shift+c).
- Alt-dragging points around prevents them from crossing vectors. This way one can drag a point along a path. Like the smart guides in Illustrator.
- Linking multiple points together. For example linking a slice and a mask would speed up adjustment if needed.
- An option to tell which slices blend with each other and which don't! I had some overlapping slices in the input work area which makes Resolume think I want to blend them vertically. Which I don't. A boolean to trigger vertical edge blend on and off would be enough.
