I have always said that recycling guys like Allison and Pat Fry is stupid, and by this I mean that Allison is overrated and ferrari did the right thing getting rid of him, regarding pat fry all i can say that his cars are garbage.
Now getting rid of these 2 guys is the best thing that can happen for ferrari, even better since ferrari got brought fresh blood in the aerodynamics department and gave more space to those who worked under Allison.
that being said i think starting now ferrari are on their way to challenge the titles.
This stupid habit of recycling engineers and drivers is bad for f1, the difference being that some drivers have sponsors and can be use to advertise and bring money to the team.
There are many examples here, beyond 2000 villeneuve, beyond 2008 massa and other dumpster tier drivers like sutil and liuzzi that stayed in f1 more than they should have.
The same goes for engineers like fry that practically destroyed ferrari.
That being said i think marchione did the right thing to boot allison and bring fresh blood and i strongly believe that until 2020, ferrari will win at least 1 f1 title.