Sorry, but where is your proof that Morrissey and Ehlers even bulked up too fast and it was just a mistake by them? I read the article that you linked here about Morrissey, and from that article it was easy to see, that it was really the opinion of the writer that a mistake happened. Morrissey himself was just pointing out that the mass made his game a bit challenging for a while, but he was in fact at the same time saying that his game improved still from the gained strength and was getting better during the season when the extra fat was gradually getting used away by the exhaustion from the season. At least in that interview Morrissey never said that a mistake was made, but he just pointed out that his skating was for a while stiffer and more difficult. He pointed out also how it lead to good things too. It was the writer’s own words about how great mistakes Morrissey had made and how he had learned from them. To me it seriously seems like the writer didn’t understand about the plan that there was most probably behind there. In fact seems like exactly the same kind of plan that the Jets have had for Laine.
To me this all really seems like just something that the Jets doctor and the coaches have planned. Just some people don't seem to realize that the saying: ”No pain, no gain” can really apply in many ways.
The point here is exactly that it seems that the Jets don’t believe in training with the help of steroids, which is not unfortunately the case with all NHL teams and players (I personally suspect that Lemieux, Cullen and Koivu and some others were most probably victims of steroid usage, I don't have proof of this, but just suspect it strongly). So their young players need to go through their development a bit harder way. But their health will thank them most probably later, so I really appreciate that they have most probably chosen this kind of an approach.
The right amount of that extra fat can really help not lose so easily any muscle mass during the exhausting season, when you still can’t do so much of the harder training that would keep the muscle mass better. When there is some of the extra fat that will be melting away easier first, and the body will not start consuming the muscles. This is much more crucial at the time when the players are still developing their physical weaknesses. Coming to the training camp totally ripped at that time can be quite a risk for losing muscle mass during the long and exhausting season.