Well personally I like the idea to have strict info about all meta's allowed in a header. Software compliant with spec verison x then knows what it needs to read / manage from such a header.
Having the !EOH meta will solve the presentation part but allowing anything in the header makes it somewhat hard for software to support editing such a header.
Having the !EOH meta will solve the presentation part but allowing anything in the header makes it somewhat hard for software to support editing such a header.