I voted Allegri, reluctantly.
Ideally Conte should stay for another year at least. But there are too many question marks! I never saw him more than a coach for 2-3 years. And I hoped he learnt some things after his spells at Juventus and Chelsea. Seems not the case. As many here said it's not worth the risk, giving him whatever he wants and than risking to leave and let you with a roster that would be too old or not suitable for other style of play.
Allegri seems the safest choice in this moment for all the reasons there were mentioned.
Would have been in the same situation like 2017 (when Spallo came), maybe someone like Poch or Sarri would have been better, to start a project from scratch. But we are pretty advanced now. We have a pretty good battery of young talents and players in their prime. And Juventus seems vulnerable. Allegri could be the surest bet to try to gain from this situation.
As a broad perspective I would like Marott stay for many years. He is calm, competent, diplomatic. I know he is not a spring chicken and I hope if Ausilio leaves, he will find someone capable to help him and when the times comes, could continue his work.