Quote - Less nodes, but you have less going on. You have to also modulate the reflectivity. In the little example two-Blinn shader, you showed both a change in eccentricity and a change in Specular_Color (via connection to a map) which means you were also modulating reflectivity.

I do agree with the general principle, but I'd go about it with a bit more math. I start with the premise of a control map defining less-more shiny. Then I translate less-more shiny into specific values of reflectivity and eccentricity, using math nodes.

If you plug a "shine" map into my VSS PM:Shine node, you would accomplish both eccentricity and reflectivity changes with one map.

thank you for your post. but i dont think i understand what you mean.  

less shiny means also more strong reflection?