I share the same concerns:
1) the PEP contains several factual errors. I pointed this out during
the core-sprints last year and more recently Berker pointed out some
on GitHub: https://github.com/python/peps/pull/1013 ;
4) Berker is/was writing a competing PEP, in order to address the
problems of PEP 581 more effectively since his comments on GitHub
haven't been addressed;
This concerns me a bit. The PEP/announcement acknowledges the work Ezio and Berker. However, it does not express if the PEP had addressed their review comments or had the current maintainers on-board with the proposal. I was of the assumption that if the current maintainers (/domain experts) were on-board, then it will be easier for the rest of us to adopt the new changes.