His hold up play used to be phenomenal, but he was making Demichelis look a lot better than he is yesterday.
That aside, the major problem with Van Persie isn't his hold up play, strength or even work rate, he's just simply too laboured. We're all about pace and power, or at least that's what I think we're attempting to replicate, yet he just isn't giving the opposition centre half's enough to worry about. Wilson came on and worked the back line straight away, winning a few corners, corners we wouldn't have had with Robin up top.
Our attacking play, or lack of it, has actually gone unnoticed in recent weeks. Van Persie is part of this problem, a big part of it.