Nidoqueen shouldn't really be used as an offensive SR setter, as it really appreciated the coverage it gets with Earth Power / Sludge Wave / Thunderbolt / Fire Blast. Also, Escavalier dropped down with Nidoqueen, so he's fun to use. Generally what you should know is that the metagame is much, much more offensive than ever before. For example: at the tail end of BW1, Cryogonal was the most popular Rapid Spin user; now, Kabutops is, as it can use Swords Dance and revenge kill many threats such as Nidoqueen and Moltres (the two best special attackers right now) with Aqua Jet. Being so offensive, the metagame is really fast paced as well, so you'll usually see faster Pokemon on these offensive teams rather than Escavalier. Some faster things include Tauros and Sceptile. Other things that show how the metagame is more offensive is that Spiritomb overtook Cofagrigus as the main choice of Ghost-type. Spiritomb, with Choice Band or Blackglasses, has the ability to revenge a ton of threads with its priority Sucker Punch or Shadow Sneak or trap opponents with Pursuit. It also traps Cryogonal, which is probably another reason why Kabutops is used more. Uxie is the most common lead now because it checks Nidoqueen and provides almost instant momentum for offensive teams with U-turn and Stealth Rock, but it must be careful of Spiritomb. Among other things, stuff like Fraxure, Crawdaunt, Gallade, and Absol have become more popular in the offensive metagame. Take a look at the metagame analysis thread for more info on what's good!