Playing a simple game doesn't mean you don't make big plays, it means you don't FORCE big plays.
You see this in every sport, young kid dominates with talent at low levels, thinks he can get away with the same style of play at higher levels, some adjust, others sink.
At the NHL level, you keep it simple and wait for the opportunity to make a play to present itself - sure it looks great on a highlight film to skate through the defense - but for every time it works you'll get stripped off the puck twice and trigger a rush the other way. Same with two line passes and other sexy players that look great when they work but can be a disaster when they don't.
The reason we love Provorov is he understood this instinctively, and as the season progressed, and he had a better feel for NHL speed, he started playing more aggressively in the offensive zone, but without taking undue chances. Ghost is still learning this, and Sanheim and Myers have a ways to go.