And defensively the stuff of nightmares.
Forget shoe-horning in the best players, build the team around Messi first, then fill in the pieces. That means playing him where he's most dangerous, where's he's capable of scoring 2/3 goals, not where he's going to be putting chances on a plate for team-mates who don't finish them, we saw how that turned out throughout this qualifying campaign.
I do think they need to find a way to make Dybala-Messi work, but perhaps that means Dybala dropping deeper and playing as AM role. I think as good as he is, Messi is just a bit wasted there. He's the one person on the planet you want 20-30 yards from goal as much as possible.