@Zetherin,
I read it as ribbing but not necessarily ill-natured.
In any case, the layout is a classic forum layout from the 90's yes but we read books that have largely not changed for much longer, and novelty isn't necessarily better or worse and the style doesn't matter nearly as much as the key differences (microcosm, pre-determined forums, ability to run it differently than the rest of a2k etc).
As for a2k becoming that way it is not in the cards, but that was the point of the groups being that way. Those who like forums that have pre-determined forums and that are moderated differently can make them this way. If you don't like the big room you can make a smaller one, if you don't like free-flowing tags you can make your own forum, and if you don't like the moderation policy you can make your own.
The group layout is retro-forum style for a reason, the groups are hosted, self-contained forums and are made to look that way. The traditional forum structure works better for smaller forums (e.g. the tag-driven stuff needs scale to work well) and it's a good fit.