How would you judge that, since even Matuidi is considered more of a starting 11 level player than Dybala from both the previous and the current manager? I get that you like Dybala, I like Dybala, most of the fans like Dybala, yet people in charge with coaching degree doesn't seem to like him and prefer not to play him. If it was some other player you would rate him as a surplus to requirements and say that it's a right move to sell.
He can become a beast of a player, but he wont make it here, it's clear as a day, people should accept that and just move on. His replacement may turn out to be even more useless to the team than Dybala, but hey, he might be just what we need to complete an already very solid unit. Let's wait and see.