A good defense will bring out the best of Andrea Onana. I have seen this with Ajax and also same with Inter Milan. I won't be surprised too when I start seeing him becoming the goalkeeper with the highest clean sheets and also winning the golden glove. It's a good thing to solve the defense because that's what will guarantee a side that'll win trophies. With Rapheal Varane gone and Victor Lindelof joining Jose Mourinho soon, I think Manchester United needs two solid defenders.
A deal to get Branthewaite completely from Everton would be lovely. He is a tall defender with pace and has a good IQ. With time, he'll work on his ball passing skills.
Yeah normally Andre Onana isn't making this many mistakes in a season. Especially at Inter he was really amazing and even finished the Champions League by having the most clean sheets among the other goalkeepers.

He probably lost his concentration this season after this bad general performance and started making simple mistakes more commonly.
Branthwaite would be a good investment thinking about the future as well. But Everton is said to be demanding around 70 million pounds. If it is true it is a quite high amount.

Let's see what the Red Devils will do about it.
Manchester United has appointed a new coach.
No they haven't. Where did you get that information? They are still moving on with Erik ten Hag.