I don't know how much say/input Hughes has, I'm sure it's a lot but he's got 2 head scouts and Gorton.
But GM's overreach for size all the time. He's not what I would call an elite skater, which is what I would use if I thought he was a great skater. When I think of poise, I think of Jordan Harris, not Reinbacher. Smarts is tougher, but even dumb players can be good NHLers if they have a really good tool or physical ability over most. He's made too many of what I would call easy mistakes that at least would have me question how smart he is. That said he was wildly inconsistent so those mistakes were more early on or mid season.
GMs pick prospects like Reinbacher, Silayev, etc.... because of the physical projections. I haven't been overly impressed at all with Silayev but I 100% can see why teams would overrated him as they hope they are getting the next Chara in 5 years. If Reinbacher became half of Josi then you got a great pick at 5th OA.