That car is surprisingly nice to me to the point it is one of my favorites in the game, even though I'm not into high aero cars usually. It's fast and pretty fun to drive, but the best part is it manages to be somewhat challenging while being easy to drive without crashing for most people. It's like the perfect car to run a championship with your friends. Sure, it's way, way easier than the 97T in any other game - including GT6 - but this is not a 97T (if you read the in-game description, it basically tells you they rebuilt a F1 from that era with the same regulations but using modern technologies below the skin), so it's a different kind of fun. Maybe try it on sports tyres if you want your turbo lag to be more deadly.
The low speed understeer is not surprising as you lose the aero and are left with tiny front tyres and a wider front track, but this is something you can correct if you want to allow suspension settings in your races.
I did some races in lobbies with this already, stock setup, one time full power medium tyres and the other one 700hp and soft tyres, both lobbies produced good and fun racing. Only thing I'm missing is the ability to force the aero to minimum and do some kind of lower tier series running 500 to 600hp on hards.