About Houle... It's really a "chicken or the egg" debate.
Has he developed numerous NHLers since he's been hired in Laval three years ago? Nobody of note.
Was he given a ton of talented prospects that under-achieved or plateaued, or was he given a terrible hand because he inherited the result of Trevor Timmins's nonsense? Probably more of the latter.
Besides this year, Houle hasn't been given a single prospect of note. In the first two years, excluding Justin Barron which I'll mention seperately, the five best prospects he received/inherited were: Raphael Harvey-Pinard, Cayden Primeau, Jesse Ylonen, Jan Mysak and Mattias Norlinder. RHP improved into an NHLer, Primeau's improved into a fringe NHL backup (although as Habsy said, this isn't Houle's doing) and Ylonen isn't NHL caliber; he'll be playing the remaining years of his career in Europe or another team's AHL affiliate. Mysak hasn't improved since Junior & has since been traded, and Norlinder's a Euroleaguer that got overhyped before he got here.
Is there anyone on that list you can point to and say Houle fucked up with him? I can't.
The one you can possibly point to is Justin Barron. But even then, he was pretty good his first year with us at Laval. For who he is now, I don't know if he's stagnated, or he's lost his confidence, but he hasn't lived up to his billing as a potential top-4 d-man in the NHL.
If you look at the prospects he received this season:
Joshua Roy: Improvement, probably graduated to full-time NHLer.
Logan Mailloux: Improvement from the beginning of the year to where he is now.
Jayden Struble: He went from an early cut at the Habs camp to someone who improved all year & spent half the year in the NHL.
Jakub Dobes: Similar to Primeau, see above. Improvement from the start of the year to the end, but the credit shouldn't go to Houle. Also, the organization fucked up by giving him the reigns to the team without a veteran backup.
Sean Farrell: Stagnated, probably a lost cause.
Jared Davidson: Stagnated.
Emil Heineman: First full year in North America, but hasn't shown much yet. If he doesn't do something next year, he's probably toast.
Riley Kidney: Stagnated, might end up in the ECHL next year.
William Trudeau: Stagnated, and there isn't room for him in the NHL. Too many bodies.
So, all in all, what grade would I give Houle? An incomplete. I'm not sure who exactly from his first two seasons was supposed to turn into a superb NHLer and we've seen growth in some of the players he received this year. I'm fine with re-signing him, honestly.
The problem with judging coaches like Houle is that it's a lot more difficult to make a definitive statement on them. All NHL organizations now keep their top prospects in the NHL and they almost never play a single game in the AHL. The best three prospects that have gone pro for us in the last few years (excluding Reinbacher because he signed his ELC a few weeks before the end of the season) went directly to the NHL: Slaf, Caufield & Guhle. Caufield played a handful of games in the AHL, but nothing of significance.
Going back a few years: Kotkaniemi, Galchenyuk, Romanov, Lehkonen they all went directly to the NHL. Gallagher would have started directly in the NHL too if he wasn't playing his first pro season during the 2011-2012 lockout.
So the best prospects we've drafted can't be claimed by the AHL coach as the reason those players have been developped, so what's left? The scraps and longshots. Hey, J-F Houle, go turn Xavier Simoneau into an NHL regular, thanks.