A different GM will target different players in trade. A different GM will draft different players. A different GM will go after different players who are free agents. A different GM will build a team entirely different.
So yes, I do think the GM makes a difference.
Maybe Mike Oke doesn't make a good first impression on families.
There's literally dozens of ways a different GM, who thinks different, views players differently will have an impact.
How about not punting a 1st and 3rd round pick the year you miss the playoffs. We should be looking forward to that 3rd round pick being apart of our roster next year, instead we don't have any prospects from last years draft that look like they will make it. If Jack Bar doesn't show up, that was one of the dumbest things I've ever seen someone do.
In 3 off seasons, Dave Reid acquired Andrew Yogan, Brett Findlay, Francis Menard, Kalle Ekelund and Mike Morrison. In 6 off season, Mike Oke has acquired NO ONE. I realize Dave Reid was awful, so were his teams, but how can one GM acquire 5 players who were all upgrades to his roster in 3 years, yet another guy can't acquire anyone in 6 years? You're going to tell me that doesn't make a difference? It's the arena's fault?
Owen Sound has put up 9 straight seasons of .500+ hockey in a tougher conference. I know the situations aren't the same. But it's a small community with an older building that isn't a top destination.
Lots of good hockey players are still willing to play in Peterborough despite an old arena.