I'm going to call this a bug. I spent a lot of time recreating 20 something pages from a Wix site in GHL for a client. As I was creating the pages, GHL allowed me to set the paths like '/path/sub-path'. When I finally configured the domain to make the site live, anything with a multilevel path 404s. In my opinion, this is unacceptable. All the reasons are obvious. It's literally a show stopper for many clients. Please fix this yesterday.