I want him to stay, however if I was him I would move to Leipzig.
If I believed in my development trajectory I would feel confident of breaking into that Leipzig team as a regular within 18 months, a bit like Sane did st Shalke.
The problem he has at City is the competition in front of him and because of that he will likely be loaned here there and everywhere for a few years.
I just don't trust City with his development if I am honest, I feel we will ruin what wis arguably the best young English player I have seen for a good few years.