It looks good to me xpdev. Perhaps you are being too concerned with minor details the average viewer would not consciously notice? :)

If I were to add anything I would add something called 'Montgomery's Tubercles'. There are several ways to add this to a procedural set up, I would use an image map derived bump/displacement (custom painted using v4 template as a guide) through a blender node mixed with the procedural. Might be a little tricky depending on your procedural chain and the masking. If you've got some patience I might post back here some tutorial images how I would do this in a few days... no Guarentees though, life has been really crazy lately.

This, Montgomery's Tubercles_