There's no doubt that making Pirlo's game difficult is important, but so is that number 10 role. Yh it's alright having Welbeck marking Pirlo but what about when we have the ball and are trying to attack? Welbeck isn't the player you want in that situation being your main play maker. He's good at running about and that's about it, he's not a good passer or a good dribbler and his ball control and technique aren't great. You tend to need those things in the number 10 role. He'd be more of a hindrance than a help going forward in that position.
Keeping Pirlo quiet isn't as simple as sticking someone physical on him all game anyways. If it was that simple then he'd have been out of the job years ago, I don't care what Park did in one game against him. There's a reason he's regarded as one of the best playmakers ever, and if you really think Danny "defensive maestro" Welbeck being near him all game is going to stop him then fair enough, but he's come up against far better players and made mince meat of them.
The reason I brought the suggestion up is because United sometimes use him there. No need to get over dramatical about it. My main point is I would have somebody there with good rate hence why I wouldn't play Lallana there.
And Hodgey your hatred for Welbeck is almost as funny as admiral's hate for Moyes.