I don't know if this is completely relevant, but the complexity of the material room with advanced nodes is daunting. I have yet to find a simple dummies guide to its use. I also percieve that when more experienced users are discussing advanced shaders, it tends to go right over my head and I often find myself looking to see if they posted examples of their shader set ups as I don't understand how to create them myself.

Maybe one big improvement to any future Poser editions would be inclusion of a nodes for dummies pdf, that explained exactly what each node did, maybe utilising some sort of chart similar to the ones in certain strategy games where to achieve x technology you first need to have a,b,c,d,e and g, so for example if you want to achieve wood , you would need to plug node 1 into port 5, etc etc. In fact just anything that made it simpler to understand.