Many will disagree but IMO it's time to move on - with or without him we badly need creative winger(s) anyway and somehow the club has to fund it.
I was always of opinion that Dybala restricts his team to play either 352 or 442/4231. Scratch that, today I'd say that he can work well only in 352, due to his athleticism or rather the lack of it. Especially, when seeing how the game is becoming more and more physical, where even in Serie A the refs don't whistle the cheap fouls anymore (has anyone noticed?).
If Allegri is interested in building his squad for 433, we can't play two makeshift wingers like Dybala and Morata in every game. Get me actual wingers to support Dusan + some creativity from the midfield would be nice.