A lot of the listed complaints are trying to be addressed by the "WikiNG" proposal, which is (of course) in the Proposals wiki on dev.zope.org.
Okay, here's an idea which people may or may not like: How about running the 'Discussion' parts of (in particular) dev.zope.org from ZDiscussions, ZUBB or Squishdot? These products are designed for discussion and are better at it than a Wiki. Speaking for Squishdot, you get a lot of notifcation (not as much as I'd like, wait for Swishdot for that ;-) and threading, and it's even got Stuctured Text support now.
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This may be a good idea... personally, I really don't have much of a problem keeping up with the discussions, but it seems a lot of people do. This idea should probably be floated in dev.zope.org itself as a proposal.
I dunno about other people, but I've given up on dev.zope.org simply because I cannot track the changes without having to put in a disproportionate amount of work.
You give up fast.