A nice demonstration Hborre. I find that most issues revolve around lighting intensity-(and BB's Light Meter Prop is quite helpful). You illustrate some helpful examples on modulating the specularity.

I usually check "Use Rough Surface Fresnel" and "Modulate Specular Softness"

I found that increasing the procedural bump from1 to 1.5 can also spread and difuse the sheen somewhat

The above render used EZ Skin without any manual adjustments to the nodes

Lighting was a combination of IDL using an HDR image on BB's Envirosphere-and default poser 2012 lights with shadows turned to Rayrace and Shadown Min Bias set at 0.3, Gamma Correction ON. I don't see any Baby Oil effects.