Right now, there are 13 infiltrators on EC, 9 on Dwilight, 21 on Beluaterra and 14 on FEI. I don't have access to Atamara on the Colonies.
In my opinion, these are reasonable numbers. The class is viable. We wouldn't want or need so much more infiltrators.
I agree those are reasonable numbers, one thing I am wondering though is how you got them?