If you look at it from a neutral point of view, he is a much better fit at Madrid isn't he? Galactico signing. Top player. Huge fee. All of that.
He could be a hero at United though!
Why should we act so flattered though if he does sign? We are technically just as big as Madrid as a business and Pogba is the type of player that we should be signing if we're to be playing the likes of Madrid in CL finals again.