I would perhaps make the mandible some bigger - it's not that it's receding (that's ok), but I think, if you compare it's size with the size of the upper part of the head, it looks a bit too small sized. Especially if you measure the distance from the tip of the chin to the end of mandible. I think that this is what makes the nose look bigger than it really is. Try a test: in the last picture, hide with the hand the lower portion of head, just below the nose. When you look at the upper part of head, nose and above, the nose looks perfectly OK. Now move the hand away and in front of the full picture again, you can see that the nose looks bigger because it's the mandible that is very small. :-)