If Manchester United have such a plan, then they will definitely be able to do something good for the next season. If they release some of their good players in the transfer market, then they will definitely not have financial problems, moreover, if they recruit more good players and sign them, then the team will be strong again. If this club can implement their plan, then they will definitely be able to bring something good for the next season. However, I think that if they can sign good players in the transfer market, then it is possible to present the team strongly again.
I believe that Amorim is a coach with high taste of quality players and it does not mean that the player must be a superstar. The management is desperate to see a new Manchester United full of strength and zealous to win trophies. United performance has been poor for so long and it doesn't tell good about them because they have lost their respect.
He has I assume as he came from Sporting and they don't have the money there to buy a shopping list and then try to get every player possible. His ability as a coach remains yet to be proven. He has left Sporting when they were at a high to then take over Manchester United which was at a low, but by all means it can't be said that he ever got them out of that hole. In one of the worst seasons, or maybe the worst season ever played by Manchester United, I think this was the worst result they could get. Only relegation zone would have been worse.