Vaporeon Nerf soon?

Because of Niantic's formula based on pokemon's stats from the games. They don't just nerf or buff Pokemon because they are "cooler."

All Pokémon in PoGo have their base stats taken from the main series games. Niantic didn't randomly decide upon how strong they'd be

Vaporeon is already weak for its stats because WG isn't really good dps wise and it is its only attack

Because of the niantic formula that only care about attack, and suicune base att is weaker than vape's. Suicune is tankier than vape though.