Very interesting stuff Garlin. If I was the hazard a guess it was to be used as a repair for damaged directx files but keeping up with certification (maybe the old one ran out)After reviewing the files, every DLL is identical in version (except for one newer file). The obvious difference is they're all digitally signed Feb 2021, instead of the original Mar 2007 release date.
But the package is missing all the .NET assemblies, and it's not clear if this was intentional. What is the purpose of this package then? And why doesn't MS mention it anywhere? Is this an one-off special for a games publisher like DX12 for W7?