I think this is an example of your own (Microsoft) internal echo chamber getting the best of you. It would be incredibly difficult for you to convince me that there were any existing customers, especially long-time customers, that were asking for this or even view it as a relevant, necessary, or even positive change. I wholeheartedly agree and believe that there are customers who have provided feedback that there are too many disparate administrative portals and functionality and documentation spread needlessly, but a rebrand does not inherently fix that. That consolidation could have just as easily been done without a rebrand.
I also find the announcement self-contradictory. Consider this statement "...the rebranding of Azure AD to Microsoft Entra ID is designed to make it easier for you to use and navigate...", which is then immediately followed by "...there are no changes to any Azure AD capabilities, APIs, login URLs, PowerShell cmdlets, Microsoft authentication library (MSAL), developer experiences, or tooling..." What then is being made easier to use and navigate?
I would have much rather you (Microsoft) just stated that you wanted to rebrand to rebrand, for your own sake and internal logic and just be up front about it. I don't appreciate the almost patronizing attempt to make it seem like this is something I asked for or has any real benefit to me with vague statements, that aren't backed up by any actual examples or details, about how this will make things better or easier. If you still wish to claim those things then you need to be able to provide concrete examples and elaborate how, for a customer (especially existing, long-time -- a.k.a loyal -- customers), this change achieves those things.