If all of the DMOZ upper management agreed to venture here, to debate and discuss policy and practices with an eye towards implementing change
Well, there we have one of the problems of the ODP. There are basically two levels of "management".
1) Meta editors (including admin editors) like Jim and me. We are "responsible" for running the directory. Selecting new editors, firing those that did not meet the expectations lined out in our guidelines etc. We are active in several forums, like on RZ (our own forum) where we try to participate in communications that are not just mud-throwing.
2) AOL staff, responsible for the backend like our software, legal stuff and things. And effectively including most of our policies. They rarely are seen in our internal forums, and barely ever in public. Very shy species, they are. ^^
While the "new" software we got years ago does offer an API meant to make the software improvable by the community, we (as the group mentioned in "1") can't change the software that's running as a frontend on the editor server. And we can't change the data structure behind it. And while we could in theory change guidelines documents, that feature seems only to be working every other year. To sum it up: We can't really implement change. And since AOL staff is (currently, with "currently" meaning "for the last few years") not very present, they can't do it, too.
Short summary of why I wrote this: Of course we could talk about change, but there is no sensible way for us to implement it. Which is why most of us don't waste their times talking about it anymore. Been there, done that. Spent lot of my time on those things several years ago.
(And regarding discussion on this forum specifically: There has been so much hostility against us here, which always has been tolerated by forum moderators, I don't think that attracts ODP meta editors very much.)