Perhaps you might be overlooking the fact that the improvement in Lua Lua himself might be down to CH and the fact that he knows that if he doesn't play consistently well there are more than adequate replacements in place which perhaps he has not had in the past
I actually think that the recruitment has been so good that Jamie Murphy, who I think is an excellent player, may not even be good enough to get a game every week when everyone is fit. Now that's good transfer business