Well, if the rookie series is anything like the 24 Heures du Fun, races will be won by people who just keep the car on track. I did a race at Okayama, started 20th, got hit before T2, limped back to the pits, spun a few times, ended 4th. Had a lot of fun too, but I used a custom setup from the forums.
I just hope the baseline is changed before the official series start, then it can be fun. Specially if you manage to stay in a good split, usually less wreckers there. Plus, with this car, bad drivers aren't likely to make it to the first corner anyways (full throttle->what->why is my car facing the wrong way?). I see the series not being that popular to rookies after a few races.
As for the car itself, I'm starting to find it fun. It really teaches smooth inputs, but keeps you on alert because it will oversteer very fast. And if you spin, you have to take it easy for a couple of corners because the tyres die completely. Then again, I only had slow cars and open wheelers in iRacing, so nothing to compare it to.