For example, pinning threads for discussing group related topics would be useful, sort of like the Please read thread at DU2-September 11.
Also blocking obvious trolls/disruptors from being allowed to post at all will probably be needed at some point.
What if we decided that for this group any Hosts related action could not be taken unilaterally, but would require some minimal form of a consensus? We could even limit it to just two Hosts, but they would have to agree before acting. Hopefully we could all agree on at least two people to Host in a reasonable manner.
Unfortunately not a lot of people frequent the DU2-Dungeon anymore, but I hope some will find it more productive over here at DU3 and visit more often. I think eomer would be a good candidate for being a Host, but I'm not sure if he's around enough should there only be two (or very few) hosts. Someone else that seems like a reasonable choice would be OnTheOtherHand - and he seems to check in quite frequently. There should probably also be some agreed to method to remove hosts if the group members feel they are over stepping their bounds.
Or, thinking as I type this, perhaps we should just have a single Host that simply serves as the person who acts as a representative of the group members. For example, votes could be held whether or not to block someone from (or reinstate them to) the group and the Host would simply enact whatever the result turned out to be.
There are a lot of possibilities on how to run a group. I have no issues with having a few hosts from different perspectives using their best judgement while using the Host position as it seems to be set up by the Admins, but I was usually not the one having issues with how the DU2-Dungeon was moderated.
What would be helpful to getting things off to a good start over here would be to get the input of people that found the DU2-Dungeon unfair. If people really want a place for more productive discussions, it shouldn't be terribly difficult to come up with some agreement on how to proceed.