Based off of what they've shown thus far, at their very best Dutchy & MacK are on another level from anyone else on this team. They don't just dominate control of the puck and drive it into the offensive zone, they do that while also being a constant threat and driving really high caliber scoring chances. MacK's not as good at getting the puck back as "**** it, I got this" Duchene (usually seen in games against Nashville or Dallas), but he's got time to catch up in that area; and with his superior shot & vision (when he doesn't panic and actually uses it) he's capable of reaching a level none of them have hit yet.
We've gotten some glimpses of what that level could look like with MacK's tear to finish his rookie season + 1st playoff series, the way he was heating up on the right side of Landy-ROR for the 10-15 games leading up to his season ending injury last year, and the way he started this season; but we've still only seen flashes from him in those stretches, not the shift-to-shift dominance he's capable of once he's settled & in his prime.
Though we'd be a much better team if we got the very best of Landy/EJ every single game as well...pity that no athletes in any sport are at their very best at all times; so we're stuck hoping that their consistency keeps improving so that we can see more & more "good days" and less & less bad ones.