I think Manchester United needs another goalkeeper, not one that would come on loan, they have to sign another good goalkeeper, so there can be competition in the goalkeeping position, i even think it would help Onana to improve a lot, right now whether he plays bad or not, he knows he isn't going to be dropped because there is no competent replacement.
Yes, they do need a good substitute goalkeeper that could man the goal posts when the main is away. And it would give Onana the constant desire to want to improve and get better if he would want to retain his place as the main goalie.
He’s not exactly performing like expected and who knows how long we’ll have to wait till when he’ll start to get better. He has great expectations expected from him and thankfully, he still has the trust of the coach.
I think healthy competition is needed in every team, not only in the goalkeeper position, in this case Onana, but in every line there should be healthy competition. But I think Onana is not too bad to replace the role left by De Gea, but I think he will be replaced if Ten Hag is no longer head coach, we know Man United situation is getting worse at the moment, Ten Hag is under enormous pressure after losing again to Newcastle in the League Cup with a score of 3-0 at Old Trafford.
I think every coach has their own strategy, and that is what could sink Onana if Ten Hag leaves. Even though this is just an assumption, I feel that the scenario will really play out if there is a change in the position of head coach. It is difficult to avoid the spotlight in the midst of a bad situation, every player will experience a setback in mentality and confidence.