Having the Visual Editor as the container for SEO is a great and creative feature. Like other similar page layout plugins, Page Builder resolves the problem while creating individuals blocks (DIV tags), SEOs plugins will be difficult or most likely fail to see the content across these blocks. However, this problem is completely removed because the content of all the blocks are contained inside of the Visual Editor. Page Builder sets the Visual Editor as read only which is again another great idea.
Suggestion for all who may try to edit content within the Visual Editor while using Page Builder (as I did and thought this was a bug), add a prompt or an error message: "This content is read only for SEO access, ref: Page Builder."