Everyone has balls that are flops. Usually when Storm tries something that rolls earlier, it's horrible. La Nina, Trauma Response, Modern Marvel, Optimus Solid, Flash Flood, Double Agent... (you get the idea.)
Their wheelhouse is the skid snap reaction. Problem is, nowadays, that reaction isn't preferred. Who wants a ball that is going to skate forever then go nuts off the spot?
Don't get me wrong, Storm has hit a lot of balls out of the park, but they should "Know thyself".