Agree with everything in your post, Benak is a textbook example on how a center should play. He has been rather snakebitten so far this season with the U17 squad (I watched every single game) and all things considered, he has been the team's best forward. Points will eventually start going his way.
If he were 5'11" or more, he would be a pretty clear top 10, maybe even top 5, candidate for his draft. Unfortunately, his size will hurt him eventually. Hopefully he can grow to 5'9", given that's how tall his father is (according to EP.)