Just to explain, I’m saying the dynamic in MetaTalk itself is unhealthy, not the resulting policy changes (separate question.) MetaTalk encourages incessant participation in controversial threads by users who want to influence the site, which then draws users who make valuable contributions to the rest of the site into MetaTalk to defend the viewpoints of themselves or others, which decreases participation across the site. It also creates an unnecessary opportunity for long-time members to get upset and close their accounts. Over time, MetaTalk has fatigued the staff, so they have implemented controls to limit discussion, which in turn upset community members who feel they are denied access to that backchannel, which has driven participation in new side channels that respect fewer of the site’s norms.
Hopefully that makes sense. Keep in mind it’s my opinion. I still consider MetaFilter a generally healthy community, too.