My $.02,
A10C - Development done 100%. Just update and bug fixes as DCS versions increase.
A10C2 - 90%. Waiting on new radio implementation AFAIK.
F16 - 80-85% feature complete. This one has seen the most love from ED in the past 8-10 months.
F-18 - probably 90%, maybe more. I really thought they would finish this one in 2021 but stuff happens. Even so it's pretty much there.
I don't get into the development weeds of each module like others do so this is just from a casual High Level perspective.
Regards.