Add a magnetic mount for the 10cm mount from B10x, B1x etc. so it easy to add Filter, grids etc. to the flash. So it is possible to use gels with a softbox.
Make a thin border to not loose any light and that it is not bigger than 10cm.
I was recently shooting with my a10, my clic soft box, and trying to use gels at the same time. I realized that the magnet wasn't strong enough to hold both the gels and the clic soft box, so I had to shoot without gels. I would love a solution so that I could use both at the same time!
Elinchrom showed very interesting color domes for their One flash. I would love to see similar product in Profoto offer. I think it works faster thank ocf II gels.