All Rock types basically take no damage from it and can in turn destroy it. RU can handle it just fine, as it has plenty of Rock types who are quite viable in the tier, especially Kabutops. It does have Steel Wing, granted, but Rocks have high defense. Can't say if it is high enough, since the SMOGON DAMAGE CALCULATOR DOESN'T HAVE STEEL WING, but even if it isn't, Kabutops, Omastar, and Barbaracle still resist its main STAB and are neutral to Steel Wing, while using Steel Wing also uses up the Roost moveslot, which greatly reduces Talonflame's lasting power.