As Tifoso deluxe, I'm very happy to see a change at the top. Arrivabene's been way too naive when dealing with other teams and not advocating Ferrari's interests strongly enough. He also should've kept Kimi on a much shorter leash, rather than allowing him to cut in front of Vettel at Monza
or setting the fastest lap on the final tour in Austria, rather than giving those three vital points up
He essentially allowed Kimi to be Hamilton's best friend during last year. If you have two drivers who can win the title, let them race, but there's zero point when the #2 driver is too slow. So for that reason alone, good riddance. Deciding to stick to three engines, rather than taking a 4th engine at Sochi, allowing Red Bull to drive circles around Vettel during the final few races and risking Kimi's US win due to Verstappen running on fumes all race long was also plain dumb. Brazil was such a stupid race to lose in that manner and Abu Dhabi with a fresher engine would've also been winable. Also, having a team principal who knows every single bit about the car, is close with the other engineers and will be heavily involved in discussing design directions can only be a good thing.