Although Sancho returned to Manchester United, but there is no guarantee that Sancho will have the same good performance as Sancho playing in Dortmund. Because after all, previously Sancho also played well in Dortmund and then Manchester United bought Sancho but what happened was, Sancho's performance was not as expected so Manchester United loaned Sancho to Dortmund again.
In such a way, I personally remain convinced that there is no guarantee for Sancho to be able to provide good results at Manchester United. What's more, there are also rumors about Juventus interest in buying Sancho and not only that, because there are also rumors that Juventus are ready to exchange Chiesa to bring Sancho from Manchester United to Juventus. With rumors like this, it seems like any decision could happen, because Juventus will also play in the Champions League next season, and Manchester United only play in the Europa League next season.
I feel like he wasn't given enough time, he was doing alright when he played, sure he wasn't amazing but he was good enough, much better than what they had last year without him at least.
The thing is that Sancho given enough time to adjust for the club would be a good lpayer, but United has been terrible for a long time and fans along with staff and management all are waiting for the team to do something, maybe not go ahead and win it all or something but at least do "something", and Sancho wasn't in their plans since it was taking time for him to adjust. In the end, I feel like what happened already happened and it could be too late for them, we should consider that maybe he should be sold, and they can use that money to buy someone else.
You never can tell if he will fit into United playing tactics this time because if you can remember Sancho was having issues s with Ten Hag which can also affect his performance in the club negatively. If Sancho is ready to stay in United he will try his best to see how he can improve his performance in the club so that he can be among the first eleven of Ten Hag.
He still has his contract on and for Sancho not to accept Juventus offer or stay back in Dortmund it shows that he has decided to be in United and put up his best performance to assist the club in moving forward to success. Next season will tell if Sancho will be a mess to United or not.