Just trying to balance it out.
You could easily apportion some blame to the goalkeeper, no-one stopping the cross and leaving Thomas alone to mark two players (who were Okoli and Mav tracking?). Not to mention the goal apparently shouldn't have stood as Cisse knocks it on for Wilmot in offside position.
Thomas is not great defensively, so we should set up to counter his weaknesses. He has quality going forward, which he showed. So here's hopping Rowett recognises this and finally adresses it.