Your avatar is really annoying. I feel like I'm being criticized by a baby...
Anyway, I have no idea what you're saying about Massa's Ferrari, etc.
I put Valencia back in the track menu for quick races only. Valencia is not available to be raced on during Career mode.
The pitstop times are from v1tek's mod. I didn't change those. They're already faster than the default pitstop times the game creates, and I'm really not too worried about them since they're the same for AI and Player...so no advantage gained or lost there. And once again the scope of this mod is not 100% about realism. It's about making the competition of the game better.
You've failed to mention if the Mercedes, Red Bull, Force India, etc are too slow when the AI is driving it, or when you the Player are driving it. More detail please...
You can race a 25% & 50% race with the 50% database. If you want to race 100%, that's when you need to change the database. I can't make one database if I'm doing scaled tyre wear, it just doesn't work that way.
So, in a nutshell, the IA times too low. Often runs 1-2 seconds slower than me and I do not think it depends on the my abilities. Perhaps, as I said, is a problem with version 2013.
The machines seem slow while I drive. Above all, I noticed that Toro Rosso is really very little, the others are good. I tried as much as Force India and I realized it was a problem setup. As for the machines that are faster than me, I saw that depends on the trail, but then again, sometimes they are all strong and fast, and sometimes they make mistakes trajectories and fail to keep up with me.
The last thing I want is to decrease the mechanical problems. Each race at least 5-6 times I break the DRS or KERS. I do not know if they are so frequent in reality, but I do not think
Thanks for the other answers and sorry for my english, but I'm Italian