Am I right that Andrew's suggestion is already in place? I tried playing with the Mosaic Tool in Ekos just now and it seemed to work. It still felt a little clunky (unable to zoom in the Mosaic window, transparency reset needed when the window is opened). Also, the Rotation tab in Scheduler does not seem to update automatically, so has to be updated manually. However, it does seem to be a large step towards (2).
Tim