I think the Kings are great at developing certain forwards. But their ability to draw out and further enhance skilled players has been, in my opinion, lackluster.
Toffoli and Kempe are the best top-6 forwards they've drafted, developed, and kept as top-six players for a decent stretch since 2006. Players like Simmonds and Schenn were traded away fairly early. And their career highs in LA is 58 and 67 points respectively. These aren't regular all-stars.
And I don't even have a problem with rounding out the players' skillset. What I was saying in the Kings board is a player like Kaliyev could have learned to defend and grind while also playing in a scoring role, alongside Danault and Moore. Instead, he spent years playing next to Lizotte and Lemieux. Byfield was saddled alongside Athanasiou (who plays a skilled but selfish game) and Brown (who was on the verge of retirement.
My point? Develop the skills, but put them in more comfortable positions to hone their skills and complement their skillset. Don't put them in grinder roles by default, where they have less opportunity to ply their trade and build confidence.
I understand a lot of this is because McLellan trusts vets over prospects to win now, but in my opinion, they should have committed more time to rebuilding and made sure the pieces obtained during the rebuild have taken over a leadership role. That's a different conversation.
TL;DR I question the means more so than the end.