While Microsoft is certainly in the wrong for removing the copyright notice, I think the author has zero basis for complaint otherwise. If you're going to release software with one of the most permissable licenses, you need to accept that for all it entails. Consider what you're comfortable with and pick an appropriate license relative to your values.
I think it's weird they didn't mention anything about Peerd or their plans on how to use Spegel to the author. They could've atleast said "btw we plan to do xyz" instead of leaving the author fantasizing about a collab.
Other changes removed the spegel project's LICENSE and added in Microsoft's LICENCE file and copyrights on all files.