El Ahmado and Delph are doing their jobs pretty well, and they are keeping possession quite nicely. I think the lack of penetration is coming from the fact that neither Holman or N'Zogbia are getting right up front in support of Bent, so that Ireland only has literally one pass on, to Bent, which is easily snuffed out. I do think that, although plenty don't like it, that Gabby playing instead of N'Zogbia would address that.
That, or play 4-1-2-1-2 instead.