• Yes, currently it supports Cycles, Eevee and Octane. And more renderers are on the roadmap.. As the development progresses I will update you via social media and Discord.

• Yes, the add-on includes two default presets one that works with cycles/eevee and a second one that works with octane. But you can easily add more presets based on .json files. 
• And if there is a significant feedback to add more default presets I will consider adding them so they become available out of the box

• Yes it does, the add-on works with a PBR Metal/Roughness workflow that includes support for additional maps like height, emissive, opacity, anisotropy, etc...
• Additionally the add-on has the flexibility to use custom workflows, so you can use even custom maps if you want. As I mentioned in the previous question.

• Install: https://youtu.be/5UablqJuw8c

• Add-on Preferences: https://youtu.be/H59sYg9y_-M

• Using the Add-on: https://youtu.be/RfbHVj3pSIc

• Using Octane with the Add-on: https://youtu.be/DWJcKItYD8I

Yes, I've prepared a YouTube playlist that has the main steps to Install, Config, Use and Octane related you can watch HERE.

Remember to subscribe to the channel keep up to date with the development and upgrades of the Add-on.

Version 2.0.4

•  Supports Substance Automation Toolkit 2018, 2019, 2020

Version 2.1.0

• Supports Substance Automation Toolkit  2020
• Includes Substance Gallery feature
• Have a list of favorite folders