Before starting work on Manchester United. Nistelrooy was working for PSV and maybe this means Nistelrooy is experienced enough to help Manchester United where he played therefor years. Even he had a good performance as the coach of Macnshter United when they were playing against Newcastle United and maybe that's a good sign to say Nistelrooy could help this team even more than Ten Hag
I think since Nistelrooy is familiar with the team the best they can do is to keep Nistelrooy for a longer time to help Amorim if Amorim agrees. Because Amorim is not familiar with the Premier League at all.
Ruud Van Nisterooy isn't only familiar with the team but as a former Manchester United player who later became their coach and recently the club manager, he perfectly understands the philosophy of the club which is why I think working with Ruben Amorim would've significantly helped to further improve the club performance but the Portuguese manager have refused to work with any of Erik ten Hag's technical staff which means that Ruud Van Nisterooy will be leaving Manchester United. Earlier today, he penned down his farewell message to the club fans and I think it was a very emotional one
From the look of things he's great at communicating with players. And know exactly what Man U needs to lift up their position in the premier league. Especially this season that the competition is high and tough. Any team that doesn't offer their best would be left behind not minding how big they've been in the past. The story behind Man U backward results stems from the management. And a good manager is the one loved by both the fans and players, a team player that could bring out the best in his boys. And that's who Ruud is. The fans love, gives him the charisma to deliver, and not to lose the respect of the club.
However, Amorim on the other hand, won't be a failure, he's making new decisions and would add players who understands his pattern of football to the first 11. He's the type that'll revive some of the benched footballers in the team, and feature them more in matches. Which isn't a wrong move.