>>49009852Dragonite is "almost" too iconic, but most likely because it was already a controversial design among fans & they didn't want to "ruin" that dynamic.
On a competitive standpoint it had just gotten its Hidden Ability prior & while megas usually gave them a different ability it would pale in comparison to Multiscale. That plus then it couldn't go for Weakness Policy shenanigans with it stuck with a Megastone.