I honestly don't think there were too many 'good' oWoD games back when oWoD was just 'WoD'. The system has some inherent problems with regards to playing online - some splats more than others - and it really was never intended to be a cross-sphere setting. Each race was basically a game unto itself with only superficially similar mechanics.
And then there's the players which, really, have not changed overmuch over the last 20-25 years. The only thing that's different is that, back in the day, there were probably about as many WoD games as there were WoD players. When MIAM came out, just about anyone could put together a codebase, slap a 'by Night' on the end of a random location and have their own little corner of the multiverse. Internet access wasn't as prevalent back then, though, so the people weren't always around as much as they are now.
As time went on, though, more and more games shut down and the population became concentrated. Where there used to be dozens of different games, now there's just a rolling handful - and the population's become inbred because of it. You can go to any given game and run into exactly the same people that you ran into in the last three games you visited. This, coupled with the fact that people have more access than they did before, makes the issues that crop up far more obvious. Before, if whackjob@ClevelandByNight was harassing players, it was usually limited to ClevelandByNight and people who knew of him might only know by hearsay. He might be on several other places, but the population was usually spread out well enough that circles didn't intersect. Now, whackjob@CBN is also jerkoff@Boise, dingleberry@Plano - and everyone has either met him, or knows someone who's met him because CBN, BBN and PBN are the only places to play. The idiocy is just more obvious.
The other issue that I've noticed is a gradual decline of stories or cohesive plots over the course of the last several years. Places try to pad their numbers by offering everything and their mother as playable spheres, but don't give those spheres very much to do. There might be one-off events every so often, but no real cohesive sphere or game-wide storyline to tell. Players might call it railroading, but personally I think game - and by extension gamestaff - need to have a solid sense of identity with regards to their game and what they want to do with it; and more importantly, why they have that game, in that setting, with those spheres. Even the events tend towards bottle-episode type things - or just random social scenes that involve getting people together in a room and letting them interact on their own. That, however, is another issue and isn't necessarily the mark of a 'bad' game; but I think it does contribute to the decline of activity.