Bloody rain. How are you supposed to know whether it's inter or full rain tyre weather from a few drops of rain on the screen before the race starts? Doing the formula GT and it's raining at Suzuka. First I put inters on. Then I laugh as the AI start on racing hards and fall miles behind on the first lap. I jump into the 2nd place car just in time to see him slide sideways into the pit entrance, blocking it and causing everyone else to crash into him.
After watching them eventually pit, I casually switch back to my driver, only to find he also just pitted for full rain tyres. Hey, bastard, I didn't tell you to pit. He was fine on the inters too, he's on,y going three seconds a lap quicker on full wets
So it seems you have a 'pit strategy' button which is more like a 'pit suggestion' button because if he doesn't like it, he'll pit anyway. Stupid arse.