For me that's it - no Campaign Mode again until they really solve the Leaderboard issue!
I'll explain why with an example:
Circuit Experience Fisherman's Ranch, Sector 6
- Pre Patch 1.06 my best time was a 30.074s, which was today restored on my Friend Rankings (that's why i remember the exact time

)
- After Patch 1.06, when they erased the Leaderboards, i did 29.101s (shows as my PB still), which was good enough for #3 in the World Rankings (as of yesterday evening).
- This morning, after the emergency patch, which probably made the car or track a bit slower, i managed a 29.342s after a few tries, which would be good enough for a Top10 rank again, but is not even showing on my Friends Ranking Board (there i still have the 30.074s).
So in order to get my times up again, i need to be faster than my pre-emergency patch times, which were really fast in a lot of challenges/missions. On Fisherman's Ranch i was in the Top10 in every Sector (no more - no - thanks to PD).
So either they do a proper cleanup - first remove the glitches and then maybe reset everything a final time, including the PBs (maybe by resetting them to the minimum GOLD, SILVER, BRONZE times depending on what you got before), or players can brag with times that are probably worse than i (and many others with the same issue) did ;-)
For now i will only start the game for my login achievement, or maybe get my 36 online wins i need to get to 91 and don't bother with the rest - i'm really pissed right now!