Pirellis are fine! Perez managed to do the race with only 1 stop as well! I think it depends a lot on the car too though, as f.e. Massa I believe was on a 2 stopper, but they had to pit 3rd time 9 laps before the end. The podium guys stopped 2 times. (I think having 1-2-3 stop strategies now is much better than everyone having only one stop btw)