Impressive! I can't wait
One request I had previously was to be able to use a materials to drive the skattering (say you have a group/component with several materials embedded; each material could be a different skatter target).
Now I think Forest pack is bitmap driven, so it could be very handy to be able to use a grayscale bitmap (or simply a BW) to trigger Skatter's probability parameter? Perhaps is it what you have in the next beta?
Voronoi are very good for random yet organic grouping of vegetation, but for things like potager we'd need more rational/organised base patterns.