His shot is fine, the issue is that he's not in position on the ice to use it often enough. He can improve on the release speed of his shot, but it's already NHL quality. I personally would love to see Reinhart less on the boards and more in the middle of the ice to utilize his vision more.
To add onto that, It's criminal that they are not using Sam in Eichel's spot on the PP, let alone not allowing the puck go through him more often. It's not surprising given the coaching staff, but it still sucks to not have the guy that is 2nd on the team in assists not having the puck go through him more with our best passer out. Instead you have guys like E-Rod, Tage, and Risto making the decisions on the PP.