With KO, I believe it's a matter of confidence and aggression.
With team Canada, the coaches are asking him to play a bigger role with the team, and he's taking the confidence from that and stepping up.
I'm not sure the Celtics will ever ask KO to be anything more than a rotation player, because they don't need him to play a huge role for this team to win. It's really up to Olynyk to step up and take a bigger role through his own play. I'm not sure he has the mentality for that, we know he already has good shooting ability, passing ability, and handles for a big man. But now can he take it to the Next Level in season 3 of his career?