Is there interest in having the syndicate contract kit/contractor system expanded upon more to become a full antagonist?

Yes, as long as it was entirely separate from traitor. E.g. there's a clear line between a traitor and contractor - much like blood brothers are. (299)
Yes, but still part of the traitor antag, and was instead something I could choose when becoming one. E.g. becoming a traitor lets me choose to be a "contractor". (199)
It's fine as it currently is as a traitor uplink buy. (54)