Agree on much. I fundamentally believe a player is overwhelming responsible for their own development. However the Oilers have significantly bungled this player's development and others. Playing him six to eight minutes, have a good game and then go back to the press box.
It's important to look into context to sift through the fog of trying to evaluate this player and the circumstances surrounding his growth, development, and performance.
Personally I saw the tentative, prone to big hits concern different than most. For me it was a development growth challenge moving from a less physical European league play to North American physical, fast play on smaller ice surfaces. Growing the processor through experience but also the confidence required to slow down play (the latter I believe was worn down and crushed with shitty development). He's never going to be a heavy, physical defenseman. He's a gap, stick defender. Though we're also seeing his man strength arrive with better ability to play in battle areas net front and along the boards.
It's strange to me that a new criticism is Broberg jumping into Final Four Cup competition after a month of no hockey is suddenly luck; NHL Cup Final level goaltending puck stopping averages; and other forces. And mainly on his off shooting side that veteran Kulak demurred to do.
It's all about the fog of latent ability and projection. Personally I trust more St. Louis's ability to assess defensemen than Edmonton's. But the value of Broberg's deal for Edmonton is gone so we wait on how Jackson/Bowman view Broberg at this price tag. That's all that matters.