Barce would never play Messi AND Neymar either.
Barcelona under Guardiola weren't lightweight.
The amount of work those players put into their game, chasing players down, covering defensively, anticipating runs. Can Morgan adapt his game to include the above? I don't know, but we need players who are both skilful defensively as well as going forward.
The central point of the type of pressing game Mel prefers is to pressurise the opposition players that have the ball. Without strict discipline and effort, that can't happen.
Added to this - hard work and effort is not a skill that only applies to teams like Stoke under Pulis. Arsenal worked very hard in closing us down and pushing us back today, even the likes of Podolski, a striker, pushed us back and worked himself into the ground.