His main problem appears to have been having to slow down for a video truck to get decent footage at least once on every lap. The car's ride height was apparently set at its maximum but I suspect it would probably have grounded not just at the carousel but elsewhere on the track as well. It's not exactly billiard table smooth.
Not a lot. Conditions looked cold and damp though, and the track is way too bumpy tnow for a decent run in a current F1 car. It was just a publicity demo' run anyway. I'll bet that didn't do his neck much good either.
Still think he drove one of his best seasons in his last year of his return. To bad he had so many mechanical and two critical concentration errors Catalunya and Singapore. Otherwise he could have taken a win in his last year.