POKEMON GEN 6 ANNOUNCED

[Tellis]

An interesting theory I've heard is that, because of the genetic theme to X/Y, and that this has a very feminine design, that this is just the first of two gender-based evolutions, this one probably being flying type and the other to be announced later will be a male, masculine fighting type evolution.

As far as I'm concerned they're already imbalanced with Steel.

Please explain. Sure they resist a lot but, they've got plenty of common type weaknesses (Fire, Ground, Fighting) and they have next to no decent STAB attacks (what ones there are have terrible distribution). What exactly is imbalanced?