Here's the thing...putting a young, talented guy on a line with less skilled players in the AHL is not going to tell you more, or probably as much, as sampling him on a line with players of equal skill ceilings in the NHL. Putting Kyrou on a line with Fabbri for example will tell you every bit as much, and probably will be a better leaning experience for Kyrou, than trying to draw conclusions from an AHL stint with subpar linemates. I'll say it again...it makes me wonder whether a guy like Debrincat would even get a fair shot within the Blues hierarchy.
The tenure argument really is a bunch of BS anyway. Stastny, prior to being traded, essentially said in an interview that a few of our "vets" weren't showing up every night and that, in today's NHL, if several guys don't show up, the team as a whole will find it hard to win. These vets failed big time this year and they largely are getting a pass.
We see other teams giving good hard looks at even 20 years olds, at the forward position, at the goalie position, etc, and enjoying some rewards for doing so. The Blues are excessively close minded on this front....and, again, it was a huge knock against Yeo while he was in Minny...refusal to trust anyone young.