Re; 458/Huracan discussion...
I hadn't driven the 458 or Huracan GT3 much before the update... I'd raced at Suzuka a bit in the 458, but only done a few hotlaps in the Huracan.
Did a couple of hours testing various GRP3 cars at Suzuka short Friday night - not exhaustive (less than 10 laps per car) but it is a track I'm very comfortable on). For me, the Huracan was the slowest car I tested. The 458 was a bit faster, but still a good way off the RSR, which is top for me at Suzuka short by a couple of tenths, primarily because it's the best handling of the cars I tested.
Might be different on a longer track, or one with less long, constant radius turns, there they could be faster.
The 458 feels to have plenty of front end grip, but is more unstable on the throttle than the RSR, particularly over kerbs... and Suzuka has low kerbs... I would expect it to be worse on tracks with more prominent kerbs. The Huracan doesn't have anywhere near as good a front end.
Best of the rest were Viper/Merc/M6... but none of them feel as nice to drive as the RSR.