The actual rate in the game was spot on, the problem is with current G-loc model, we cannot maintain that rate.
also, the G on set rate is not correct, way too slow for G on set. I think this has already reported but ED still investigating ?
as for tomcat, you can`t out turn it(sustain) with current fuel load, (50% F14, 50% F16)
and tomcat performance sometime falls outside the known data depend upon the pilot, so it became a guessing game at some point.