I'd like to have the points system back, and the shop where I can buy name glows and user titles, attachments and other stuff.
Other than that, the only thing that does not really convince me (yet) is the social groups stuff, as it appears to add more jungle-ness to the forums. That mustn't mean it won't turn out to be a fun thing eventually. I also don't think that this feature *will* splinter the community, I mean, all the sub-forums here don't produce such effects, so...
As for friends/album/visitor message features, they might very well add to the experience the user will err experience here, if he wants to.
What I see is the need for rules to be put up and some kind of moderation at least for the public available areas of any of the new features.
And a "beforehand" poll most probably had everybody say yes anyway.