I don’t see the need to bring De Gea back to Manchester United. The decision to part ways has already been made, United have to move on. If Onana is no longer m good enough for the team they can sort other options elsewhere, I believe De Gea is not the only good keeper available to Manchester United.
Just give me a good reason why you think they shouldn't bring back De Gea back to Manchester United? David De Gea won't be the only player to come back to his former club, many players in the past has done that. Manchester United knows the capacity of De Gea and how important he can be for them in high profile matches, and in the premier league. De Gea is a proven goal keeper who will fit in perfectly with the premier league demands. Manchester United don't need a new trial and errors with their goal keeper. They don't have to start with another experiment at the start of next season. They tried that with Onana and it didn't work, they don't need that again in the upcoming season that all eyes will be on Amorim, to see how well he will lead the team. To me I don't see any problem in bringing that young man back to the club.
The reason is because David De Gea wasn’t the problem but the club made him the villain. Manchester United should move on, bringing De Gea back will only put unnecessary pressure on him to prove a point, what if he fails? If I was De Gea, the only returning to United will be for managerial or off pitch position.