This is pretty ridiculous. Players are a case by case basis. Does this mean Byram has to go back too? Is he going to be ruined if he only has 1 year of development post draft? What about MacKinnon? He didn't even have 1 year of post draft development, did he turn ok?
I love this mentality, that had Jost stayed another year he'd been exponentially better. That's such trash, the guy simply isn't a good hockey player. He has average skating, average shot, average IQ, and isn't the type of player that can effectively play bottom 6. Another year of college wasn't going to fix these glaring issues.
Players should be evaluated on a case by case basis. For a guy like Byram, there is nothing of value he can learn at his current level if he isn't here is going to be a waste. Newhook probably could benefit from another year, he'll get big minutes in a decent league could have a decent shot at winning the Hobey Baker. That being said if he isn't interested in going back or wants to start his professional career, then you at least have to entertain the thought of signing him as he had already proven to be one of the best in the country for his age. The only reason Makar went back is because he wanted to.