I'd say the stuka seems OK in 1v1, but in team games I honestly feel it's over the top. The way it kills crewed weapons outright, the gun AND crew, is too much compared to everyone else's artillery. The way it one shot all buildings was equally absurd too, but I'm not sure about that behavior now with the changes made.
In team games (worse the larger the game) and some maps, it's an absurd unit, as are several others.