Changes on GitHub.
Blender 2.8 is sort of a mess in terms of workflow. In Cycles, I may want to change "material" mode settings such as bloom, ssr, and sss. I have to go back to EEVEE in order to do this even if I am wanting to work on a raytracing project. So with this new UI addon I'm making called "Unifier" I hope to fix this issue by combining the options from Clay, Workbench, EEVEE, and Cycles, into one collection, so that everything can be done from one single engine. This way I can use Cycles (or possible a "Unified engine") for everything at once which will hopefully result in a better, more efficient workflow and experience.
The focus of this addon is Cycles. This is because Cycles has every other engine such as EEVEE and Workbench fully integrated into it as well as Cycles raytracing.
Currently, the addon moves everything to the "collections" section in the properties panel. This is only temporary and will likely change. Also, if you are using EEVEE you will lose the options in the render panel because they are moved to the Collections panel. Same with Clay. This will also change, I've only been working on the addon for two days at this point. A more elegant and simplified interface for the options may also be implemented too, but currently is not the priority. I may also be combining custom EEVEE material settings into it soon. Just not for the time being.