Don't disagree at all... It's a bit semantics, a bit differences of opinion on how development works.
I don't really see much point in "being a little concerned/disappointed" in a 12-game, injury affected sample size... Particularly one where he's still getting usage and production far ahead of the curve for a player his age in the league he's competing in.
He'd "look" better, undoubtedly, were he playing in the NCAA or OHL against weaker competition. The context matters more than some expectations seem to consider.
Is Hunter Brzustewicz a success & RB a disappointment because one is dominating a lesser league & the other having less of an impact in much harder league
What level of impact/production would RB need to show to be considered average vs a concern? What about excelling?
Expectations should align with standards & context (injury, team deployment, league quality et) ... I'm not sure I get the standards by which his play this year is concerning or disappointing... But I also expected that he'd have an ongoing learning progression that includes smaller ups & bigger downs than teens playing in CHL or NCAA .