I think it's also useful to note that Mullenweg wasn't demanding 8% of WPE's revenue, but rather an allocation of WPE revenue to WordPress ecosystem development (by staff members on WPE's own team), with the revenue to Automattic (or whoever, I forget) as an in-kind payment option.† That is a much more reasonable-sounding ask than simply forking over cash to Mullenweg's own business.
I'm not following this closely enough to vouch for the way Mullenweg is handling any of this (though: at this point I assume/hope he has counsel reviewing what he's saying!) but it would be weird to me at this point to see WPE cast as the "good guys" here. This seems like another one of those "it's just a bunch of guys" scenarios.
† This is according to Mullenweg, of course, but he had Theo Browne reading emails to WPE off his laptop during the interview to back the claim up.