Yes, not having a certain offensive skills absolutely hinders the offensive ability of said player. The only times it doesn't is if said player is absolutely elite in all other areas.
If you can't beat a goalie from distance, it changes the way the defense plays you, it changes the way the goalie plays you, it makes playmaking a lot harder.
Name a legit 1C in the NHL that doesn't have the ability to beat a goalie from distance?
You were talking about him becoming a middle 6 C and a lot here are talking about a 2C ceiling, so it should be appropriate to compare him with current 2C’s instead of 1C’s.
I surely don’t think « elite shooter » when watching guys like Plekanec (the prime one that is), Krejci, Kadri, Stastny, Bryan Little, Derick Brassard or Backlund... Are they successful NHL centers?
Nothing says that Poehling can’t improve as a scoring threat (reminder that he scored 14 goals this year); he’s not even a poor shooter, he just doesn’t shoot very often.