Here is my opinion. I think first off, you look great as others said you would look really good with more mass. But I think you have a great build. As for suggestion on back and lats. I think you are doing too much for your back. I personally feel all you really need is deads and pullups and I gurantee you, you will get bigger (if your diet is good). If you wanted to add some type of rowing motion, that might be ok, but you show me a person with a great deadlift and can do good weighted pullups and I bet you they have a great back both thickness and width.
Also, maggmaster, and please others chime in. My thought has always been, wider is not always better. If you go too wide, i think you shorten your range of motion which range of motion with all exercises is the key. I know Arnold was a big advocate of wide as possible pull ups for a big back, but I think Arnold could have done anything and had a great back. Please anyone chime in please, I do mine slightly wider than shoulder width.