I disagree.
2. Huh?? Sure, sometimes Claydol can be KO'd even when it has 80 HP rather than 60. But ALL the opponent needs is to Bright Look and Flash Impact. They don't need to Fire Spin your Claydol (that's basically unheard of lol), they don't need to bother to get a Blaziken out and jet shoot (which would leave BlazeRay very vulnerable to poltergeist), they don't need to double-crobat or Trash Bolt + Crobat your Claydol, ALL they have to do is Bright Look and Flash Impact. As opposed to the afore-mentioned situations, this is VERY easy to do.
But what? Queen tech as well?! Good luck getting two bench-sitting Stage two's out and a constant stream of gengar's in this format (full of bright look, mespirit, power spray).
3. Uhh, this makes no sense. No-one's FORCING you to run extra energy to attack with Nidoqueen. But you probably should be running 10 anyway (6 psychic 4 Call). But idk if you're ever played gengar/queen, nidoqueen plays SUCH a big role in that deck as an attacker. Gengar without a back-up attacker like nidoqueen can always just run out of ways to deal good damage if the opponent unown g's the right pokemon, and keeps trainers out of their hand. Nidoqueen can do a lot of damage even if your opponent can play around gengar itself. Metagross cannot do this.