H2O was great for a number of reasons. And there are a number of reasons for its eventual demise.
First, the software and server change killed it. The board went down for 72 hours, and that is an eternity on the 'net. The new software was absolutely horrible and the familiarity and nostalgia that made H2O special was gone.
Second, Rick went off the deep end, started posting very weird things, and was always an odd, distant sysop. H2O used to have an identity, then it starting morphing, and with the 3 day interval, I think a lot of us started realizing that H2O's identity was undefinable, and it suddenly became an uncomfortable place to be.
Third, and corrolary to the above, H2O's main focus was on reform, and eventually there were no reform-minded active JWs who inhabited the board. Rick never, ever took my suggestion to heart that the OPEN FORUM be put on the back burner and make the JWs in the 21st Century forum the main one.
I haven't even looked at H2O for 16 months, after thousands of posts over 5 years. Too bad, too bad.