Hi, First let me say that I am only level 9 in B spec. But I am not having any of the problems you are talking about...mmmm well some. First of all I satrted my first driver just like I started in A spec, with a MX5 all I put on it was Sport Hard tires, and a full suspension, full transmission, sport air intake, sport exhaust, no engine mods. I started out at the Autum rin just like you start in A spec.
You have to look at what type of driver you have, have 3 drivers right now all different. But all three are strong in the metal strength, that is important, if they are not strong there in hot competion the strength drops rapidly and they make mistakes.
Don't give your guys high powered cars to begin with they are just leaning. When you first played GT could you drive a high powered car great? They are the same it takes time. I race all the beginning races over and over with them.
I have one guy who s pretty hot tempered, I try not to issue to many commands, he will always charge out hard on lap one, as soon as he is close to over taking the number 1 or two spot I send slow down, I have to send about three three times and then send maintain pace. He might only be 3 or 4th at that time.
Watch the strength guage if stays in the red tell him to slow and see if it comes down, once out of the red maintain till he is close to next car to pass. then tell him to over take right after over take I send slow down, then maintain.
I have another guy who is very cool right at the begining I send over take untill he is past two or three cars then send maintain, but he will fall out of the red very quick. I let that happen till he is about the middle of the guage, the send speed up and watch the guage if it get close to red send maintain.
Each guy is different you have to learn how to work with them, but don't put them in high powered cars, that might be part of your problem I use the MX5 or my MM car with 130hp, they are now at levels 9,7, 3. The guy at 9 can drive my lotus and my BMW Z4 and my RX-7 all of which are about 300-450hp, fairly well but you must keep him out of the red. The others drive much less car, I put my level 9 guy in a California Ferrari with 575hp het got to the lead right away and then continued to loose it, he is not ready for 500hp. Take your time, I run about two or three races with them and then go back to my races.
Let me know if this helps you.
Ken