@shegeek
It has been a long time since I followed this tutorial, and I haven’t watched it again now, but what I notice is, going from your Surface Output to the left, there you have a Mix Shader, that mixes a Diffuse with a Glossy Shader. When the Factor of that Mix Shader is 1, then the result would be pure Glossy Shader. As the Factor you Add (should maybe be an Overlay???) the Vertex Color output (which is a value between 0 and 1) to the output of a Color Ramp (which also gives a value between 0 and 1, in this case). So, you end up with a value between 0 and 2, as a Factor to mix the Diffuse and Glossy! That is way too much Glossy for any purpose!
And furthermore, in 2.8 the Displacement (in the Material Output Node) is a Vector Displacement (purple socket). It’s better to use the Vector > Displacement Node for that, in stead of the Multiply Node…
And lastly, yes, the light values have changed in 2.8, mainly to get consistency between Cycles and Eevee.
I hope I didn’t confuse you more than helping;)
