Up until today I don't think they've seemed anything like as comfortable with the ball as they used to which makes it really difficult to make headway when teams are content to sit off, as increasing numbers of teams will look to do now Wolves are seen as more of a threat given recent successes. That then gives you another problem as some teams will see that you look a bit uneasy with the ball and now they have the option to either sit off being cautious to cover the counter or maybe attempt to get amongst you and see if they can exploit that lack of composure in possession. I'd say since the turn of the year that's been the issue, lack of composure, when teams allow the counter it's not so much of an issue because a quick ball into the channels could pay dividends but if they cover that off and/or really press well then that lack of composure causes problems.
Take today as an example, Newcastle didn't really offer much of anything in the way of ambition but Wolves still didn't really go for the jugular at any point, not so much Wolves being kept at arms length but willing standing out of arms reach. There were large periods of the game where Wolves just seem to abandon central midfield and restrict themselves to trying to play around the outside of their opponent but in doing that it usually drags the wide forwards into wider positions to create overloads and then you struggle to get any numbers in the box to get on the end of anything you may create. In the period just before the opening goal Newcastle had completely dropped off with Wilson stood inside his own half just watching the back three, then Neves decides he needs to drop in ahead of Wilson to get on the ball, why? If you can't trust one of the three centre halves to bring it over the halfway line under zero pressure then what is the point? No-one from Newcastle's midfield would follow Neves in there so he's not creating any spaces to be exploited, merely stacking the numbers further in Newcastle's favour when you try to go forward.