Hi Rob,
I am Dave, I will help you with this.
1
There is no further news from Microsoft on this requirement being added to the Windows 11 Pro installation process, the best option is to keep an eye on that blog for further news.
2
Yes, you can upgrade from Windows 10 to 11 (Home or Pro) without a Microsoft Account, it is only when you are performing a clean install from a USB that you must use a Microsoft Account to set up the PC in the OOBE, you can then switch the account back to a local account after the installation.