J_D said:
My purpose in posting here now was not just to complain, though, but to get the question of my o.p. answered since I know many people here also are also active over there. Why did they do this? What was wrong with the way they were doing things before, the way ENWorld still does things here?
(EDIT: I now think I misinterpreted your question which I think was aimed at the management not the userbase. So you are free to read what I wrote below from a users standpoint but I don't think it really addresses your question. I blame the lack of coffee in my system at present and promise to rectify that.

)
I'll field this one but it gives only my perspective so I don't know how useful it will be for you.
My usage of ENWorld has evolved significantly over time.
When I first found the site (way back in early 2001 I think), I had just picked up 3.0 D&D and decided to give it a try after a dozen years of playing other systems (principally Rolemaster). I had TONS of questions about rules interpretations so I almost exclusively posted in Rules.
After a bit I was in full swing as a GM and began to start browsing around for plot ideas and GMing techniques in General. I did most of my posting in there, especially after 3.5 came out and I didn't shift to the newer edition immediately (because all the talk in Rules at that time was about 3.5, which I wasn't playing). I also started a Story Hour so I was reading, writing and posting in that forum quite a bit.
A year or so went by and we got the NC Game Days started from a core group of posters here at ENW. As I got to know people better, I began to post more in Off Topic because I was interested in knowing and sharing about stuff other than gaming. In particular time just before GenCon 2005 I was hanging out in there.
After GenCon 2005 I had met loads of folks from here and felt much more like I "knew" them and my posting was much more focused on Off Topic. Not long after that "The Nut Test" (which eventually became Circvs Maximvs) opened up and most of the people I talked to in Off Topic migrated over.
The atmosphere over there suited the off topic conversation better for me because you didn't need to make sure that your posts were not "over the line" with regards to certain topics or language. I didn't go there with the express purpose of being mean or using foul language. But on the occasions where such things were my response to the situation at hand I had no need to censor myself on account of any rules.
To me, ENWorld and CM serve two very different purposes. ENWorld is to talk about gaming. And the rules here serve that purpose very well because they ensure that conversations can focus on the topic rather than sniping at one another individually. CM if for talking about other stuff (though I do discuss gaming over there some) because I can just say whatever I feel like saying without it being governed by external rules. What I say IS governed by internal rules however and I don't use it as a place to be cruel to anybody.