The main problem is that it provides a very weak power fantasy. In FC you actually feel like a dictator who can reshape society and do anything to anybody while here you feel like a walmart manager.
Also we don't need 2 FC, it takes time to grow a modding community, and it's extremely difficult when there's already one well established.
It also doesn't help that the OG dev left this game so early when the community is not there yet - there's still not enough meat to keep it going.
IIRC, the dev is a FC fan himself and one of the reasons he created this game is the frustration of how non user-friendly FC's UI is - of that I think he accomplished, for a new player FC is quite a hassle to get into compare to this one.
For me, FoC gets a plus as it's more sexual orientation neutral meaning it can get a wider range of possibilities, meanwhile FC feels more catered towards hetero audiences.
Maybe there's a chance the two projects can be merged - the more advanced UI from this one + the rich contents from FC.