Exactly.
He offered nothing to support the club last season due to Injury and now with the doping suspension it's all over for him. Paul Pogba's performance dropped due to Injury not age he can still do so for another three to four seasons if he isn't Injured.
Heading Saudi Arabia was my desired direction for Paul Pogba but he wanted a further stay with Turin. One man down, Juventus will have to search the market for replacement or bring in a fresh talent.
I think they're going to regret signing him again into their team because he's not create any impact for them yet due to his lengthy injury spells that's kept him out of the squad for a while and they could benefit from his talent and i know Allegri would he so furious about this news because they were expecting his return to help the club improve this season, well I don't think he might continue being Juventus player anymore and they could let him leave the team.
Well you're right because Neymar is an injury prone player and they still signed him to a Saudi team due to his quality and that might end up being Pogba's fate cause no top European club would sign due to his injury problems, signing him would be like bringing a dead wood into the team, the Saudi club might not benefit from his performance on the pitch but he'll make their team more popular.