I am not trying to get anything changed and am quite happy to race under whatever rules are in place...even 5%

...this is a great car and fun to drive just about anywhere...it even made me halfway like the new Silverstone layout.
Some food for thought though.....
Back before I had my medical issues I used to run in a private league that raced the FW31 (still one of the bestest/funnest damn cars in here, IMHO) and Clayton had it set at I believe 60%. It introduced an interesting aspect to things because some guys would start light to be faster and get a lead and try to maximize their in/out laps on the pit stop. Other guys would go max fuel and as deep into the race as they could. I wasn't awesome so usually carried enough to go to halfway +/_ a couple laps so if i was in traffic I could pit out of it or if the aliens were arriving I could pit to get out of the way.
It does bring tires into play though, as Gunner mentioned. Granted this was all back before this NTM and it's improvements. The guys starting heavy to run late into the race had to take care of their tires but also had to decide if they could make it to the end. I remember several guys wrecking out with only a few to go because the tires were just gone. That may well not be the case anymore though.
I've never been one for strategy because I'm not good enough to be thinking about stuff while I'm driving (love Crewchief) so as I said, I am merely throwing this out there because of past experiences and some guys in this league are certainly good enough to take advantage of something like this and it did make things interesting on occasion.