He's having tons of talent? How do you make that conclusion, based on his 60 minutes vs Chievo?
Until he shows in those scarce number of minutes that he's been getting every now and then flashes of what he's capable of, that there is a genuine talent which should be nurtured, there's little chance of seeing Coman more, unless we're playing Coppa. One decent game doesn't cut it.
Training won't shape him as a player? Ridiculous. He's 18 yo and trainings are most important for him now.