I see what your saying but Dortmund have kind of relied on Erling and his goals the last couple of seasons, and he has a lot of goals to be replaced next season, that is going to be impossible to do . So while Dortmund look for the next big thing. Bellingham is going to be in a team thats not as good as it has been, thus a waste of a season when he could be being coached by Pep and starting a new era at City .The kids young and is guaranteed every start there playing CL football he is anything but wasting a season there.
If anything another year there is perfect for his development without the pressures of a top club and English media pressure along with a huge fee