new document 2019 link is here .
some different from old document ( that removed from github)
Why required ?
some properties , why required ? old feed document wrote that optional .
I test new 2019 version feed with no those properties , it passed preview feed validation! .
Hope admin rewrite document for anyone in future. thank you all.
I've already written to Roku Partner Success about a previous problem with the Json Spec document. They corrected it in about a week.
I agree with your concerns and have requested the Partner Success review your concerns as they do seem valid. I'll reply when I hear back.