I posted my thoughts in the google form, but figured I might as well post them here as well to see what others think. Set is good overall, but personally I'd rather see "Delete" or "Backspace" for the R2 1.5u BS key rather than the chunky x-in-block icon since the rest of the mods have text (or if you want an icon, just the simple left arrow). Also I think it'd be good to add 6u bars, though you'd need to decide on center stem or offset since GMK has both now (if it increases the cost too much, could just make a spacebar kit for the accent bars like other sets do). And finally, going back to the modifier thing, given that the mods are text I think something like "Code" would look nicer than the windows logo.
edit: just realized I basically said this early in the thread already, oh well