Again, I think you're overestimating how much Ehlers is "ad libbing" on the PP, at least in terms of plays that work. As has been said (and you can watch the vid i posted earlier), most of the movement on the PP was coached and choreographed with specific goals in mind of creating quiet ice and opening passing lanes
For every genius "wow, what a pass that leads to a goal" there's a "what the f*** was he thinking there" pass to nobody with Ehlers. Even the pass to Connor on the Manitoba Miracle goal was a dumb play... the only reason it worked was because Connor flubbed the shot and it went to Perfetti - a stroke of pure luck. That puck should have been put on the net with less than 5 seconds left in the game. The goal was a classic Bob Ross "Happy Accident".
At the end of the day, this sort of boils down the issue with the guy. Fans see the amazing plays that work out and revere him, while coaches and some linemates yearn for a more predictable player. I'm sure people will hear that and think that I'm putting Ehlers down, but I'm not. He just needs guys who see and think the game like he does to play with. Unfortunately, in the highly structured and scripted game of today, they're hard to find