At the end of the day the developmental needs of each player are different. There are certain junior age players who play a very immature game and need to be pushed by bigger, faster, older players and put in situations where they need to make decisions faster and with less time and space. These players need to be forced into environments that force them to change the way that they play. 9 out of 10 times the best way to improve is to play with better players at a faster game pace. The downside obviously is that pro hockey is a money-making business and his impacts how certain players are deployed what certain players are effectively allowed to do (especially young players) within the game.
Danielson doesn't fit this mold in my eyes, however. He plays an uber mature style and can make decisions at a pretty good pace already and doesn't seem to struggle reading the game at a level faster than CHL hockey. At pre-season NHL level, however, he also can't play a ton with the puck on his stick and regularly defers to others (not always in a bad way mind you). He definitely has puck skills and definitely can shoot the puck but i think he has room to expand what he can do with the puck, how to get to the middle of the ice with the puck, play at different paces, improve two on one play with and without the puck and find additional ways to utilize his teammates when he has the puck. His game now is very direct. This isn't necessarily bad but it does sometimes make you overly predictable. I think the WHL provides a place where he can try things with the puck with a bit more time and space and can do so without the threat of being benched or seeing serious cuts in ice time or opportunity. He can also cover for some of the risks that he takes at that level (which is something he absolutely won't be able to do in the NHL at this time).
I don't want him rushed into a situation where he is forced to become so conservative that he becomes another Riley Sheahan. We don't need to rush Danielson. This isn't the 2019 Red Wings we are looking at. We have far more legit NHL depth than we have had in a very long time.