One change that may be positive would be to watch the neg-repping. See if anyone seems to be abusing it and unnecessarily singling someone out. It's okay to neg if sincere and deserved, but (imo) not just as feud or to incite agenda.
The big issue, as I see it, is attacking new posters... that, more than anything, makes for a duller site. I personally know two people that only posted about a dozen times and were so frustrated with the onslaught of BS they lost interest in a hurry (and both of these guys would offer very good chat about Jazz bb).