Don't be absurd. Milner clearly does not offer a lot more going forward than Clyne at left back. That's one of the most ridiculous things I've ever heard with respect to football.
Milner does almost nothing when it comes to offensive output from a fullback position.
No one gave Clyne acres of space. United certainly didn't in his last game and even in the pre-season games this season, Napoli and Man City were pressing him anytime he came near the half way line.
Teams never gave him acres of space before his injury as well. This is just made up. Go watch some youtube clips of him, dude.
Either you're trolling or something is wrong with you. In any case I feel like I'm wasting my time discussing Milner's offensive output from LB.
It was a horrible move from Liverpool and it cost them the title. The draws came right after when they had to shift their midfield to defense.