I have done/won 30-35 of the races in the PP so the most difficult are yet to be challenged, perhaps too many players failed too many times on the last races in the PP according to the data sent to PDI?
I suspect that this is exactly what's happened.
I have a theory:
PD sees all the data 'cause it's an always-online game.
PD notices the general thrust of complaints.
PD reacted by boosting the PP of the stock car choices.
Either because the month's update was rushed-out (a week early) and / or because it trusted the PP system "blindly", judgements were made without necessarily testing the results when upping the specs of at least some of the cars.
Case in point re that last comment:
For the 1000hp challenge events, when it comes to the 2-chilli car (that's all I've tried), if PP alone were used in making the tweak judgement, it wasn't a fair basis for it 'cause the straight-line speed of the vehicle
way more than compensates for its understeery, sub-par cornering ability on tracks that feature decently-long straight-line sections.
On the Tokyo track, that ratio is higher than at Deep Forest, hence my guess that any average Joe could win it from-the-back in, conservatively-speaking, 3 laps (I did it in 2). That's in a 10-lap race for Heaven's sake.
Deep forest, whilst the ratio is lower, still features two decently-long straights, making it an easy win from the back as well.
Bottom line is, speaking based on my limited poke around last night, a de-nerfing patch must surely be on-the-cards, and as soon as possible IMHO.
The argument that we can now customise things to our liking thanks to the new ability to use our own cars entirely misses the point. Let's get that "stock" baseline Power Pack magic happening as it was originally intended please PD.