I find it odd as well, I've been using Charizard to great success, absolutely screwing over the Will-o-Wispers in Weezing and Misdreavus with powerful Fire Blasts and dodging super effective blows from the ocassional Thunderbolt with Roost, which also helps it play around their Pain Splits as well. Slower mons that do not resist Fire have a hell of a time dealing with Charizard's power and coverage. While Charizard is heavily weak to Stealth Rock, most of its checks in Altaria, Mantine and Flareon are also weak to them, so Charizard can still fight on even footing even with 50% of its health shaved off. If one can be crafty about it, Charizard can even use Stealth Rock to its advantage by edging itself into Blaze Range, which boosts the power of its Fire Blasts to astronomical levels, though it usually means being KOed right after by LO, if not a revenge killer's/survivor's attack. Of course, who can forget Solar Power, which fries pretty much everything that doesn't resist Fire and have high special bulk. On occasion, Charizard can use Choice Scarf, Dragon Dance or Tailwind to get the drop on the metagame's faster foes, which will succumb to Charizard's power much more easily than its regular targets.
Has it been already mentioned that this metagame has become somewhat Fire / Flying weak? Charizard getting STAB on both means if he gets an opportunity to attack, chances are something will get scorched/blown off the face of the planet.