Whilst I do agree with the majority of what you have said, I don't think a 15 year old should have exposure in the first team and be fast tracked that quickly. Promoting him to the under 21's was the correct decision, however the club needs to lay out their intentions and give him a pathway to the first team alongside this - which I highly doubt they have. The tribunal fee system is not fit for purpose and needs changing here.
I do agree that Page, Nelson (earlier in the season), Monga and players further in their development should have had more first team game time and who can blame them for wanting out as older players were prioritised.