Not sure what sucked about it. It was fairly revolutionary for it's time, especially the netcode. Their servers still can run 250 players. It's not uncommon for the original JO to have over 190 players on a good holiday weekend in one server, and 600 players spread throughout the game rooms.
In fact the only reason I haven't bought any new games since JO and its expansions is that I'm a tactical gamer. I enjoy strategy to my games, and JO delivers that when you're hanging with your friends. Getting 80squad mates into a single map and commanding them all through all the different vehicles is engaging. Run and gun gets boring, and its tiresome. Americas Army had some of that right by making it so you couldn't respawn in a game, made people use their heads for once and learn they can't respawn infinitely after taking bullets. But I realise most people in the market want cheap entertainment that isn't realistic. But that's why me and my clan don't do run and gun nor allow it from new joins

.