They would be even more of a lazy reskin than the Mechagnomes are already are. Both the Mechagnomes and Gilgolbins are better suited as a customization option for their main race. I hope they do change the system in the future to a flexible one where your racials change depending which subrace you choose.
~The kelfin love/allied race discussion thread ✿
There is some pretty cool ideas for them in this thread. Besides. They would pretty much in line with just about every allied race before them.