I am working with SEO Helper update with RW 8, Stacks 4 and Foundation and trying to establish some guidelines for the use of SEO Meta Tags by Joe Workman.
Since posting this topic I have answered some of my questions and after a bit more experimentation I will post my knowledge.
After playing with the new stack I have come up with the following rules for myself.
Turn off all RW meta tag settings on all pages.
Only have the Basic stack on the home page.
I can put a Structure Data - Product stack along with the Basic stack on the home page, although only one of them can have the Meta tag setting on in RW. This is a mystery.
I can put a Page Description stack on other pages, alone. The stack is installed with the RW meta tags on. I turn them off.
If I mix other Meta Tag stacks on the same page I get Duplicate Meta Tag warnings.
I have found no way to use the Robot stack, unless it stands alone on a page.
The SEO Basic stack cannot be moved out of the Meta Tag stack. The Structure Data - Product stack can be moved out of the Meta Tag stack. It is not clear if this effects the search engine.