Yes, I was on softs. I am able to get good pace, but just need more experience in traffic with this car. I find if you get off line and need to brake or accelerate when the car is slightly out of balance, there is no recovery. Other cars are more forgiving in these situations. I think it due to the rear engine weight.
I've only tried it once but it seems very similar to the 488 in that the softs are very tricky to manage. Mediums are the way to go at first i think. Then try the softs on easier tracks than silverstone. Monza is a good one to start with!