For me, it basically boils down to this: You have a prospect that's got heaps of potential as a scoring threat. You have three lines he would work well on, in theory, and to varying degrees--I think Hags-Geno is the best combo for him. You sent him down because his game wasn't rounded out enough last season, which I didn't really agree with and thought he was NHL ready and could work through the growing pains, but it is what it is. He tore the AHL up, and by all accounts he's worked on rounding out his game to be more responsible without the puck, and used the pre-season to showcase that to an impressive degree. You know young, purely offensive players, wingers especially, are notoriously streaky and confidence and a comfort level are paramount to their effectiveness. So, with all of that in mind, you put him on a line that stands to get the bulk of defensive responsibility/d-zone starts, roughly 10 minutes a night, and his center--whom a guy like Sprong (in the mold of James Neal) is going to rely on heavily for better or worse--is going to be Riley Sheahan. That's just about the worst possible avenue of attack you could go with regard to getting the most out of the kid and helping him develop, grow and become an effective and productive NHLer. That's Bylsma-level shortsighted. It just makes absolutely zero sense to me.
At worst, you put him with Sid, Geno or Brass for a 10 game stint and if he's wholly inept or now showing any sort of pulse, you put him with Cullen-Sheahan in a reduced role so he can figure it out slowly--not the other way around. /shrug
Anyway, gym time. Excited for this season. This forward corps is as deep as it's ever been and likely ever will be, and I'm super excited about Riikola as well. If Letang returns to form (and manages to stay healthy for the playoffs), Murray bounces back, and we get the best out of our forwards, we're in a supremely good spot for challenging for another Cup.