You are, Im sure, refering to the fact that DL hasnt played as CB lately. The reason is simple. Mourinho isnt a man who does drastic changes to his team...when its not needed. JT+GC has worked REALLY well. Plus with the fact that we've needed someone else when we dont have Matic in the DM made Luiz a natural choice there. To answer your question: DL is worth much more than 20m. He is very versitile and can play well both as CB and DM. Anyone who doesnt rate him above 20m is simply clueless. That is not an insult against you, its a fact stated. If you take offense by that, then cry me a river.