Yeah, Cassie has all the powers of both Ant-Man and Wasp - once she gets enough experience under her belt, she'll probably be able to match all of the other Pym Particle heroes. Nadia has the same inexperience problem, and doesn't have the ant control ability. The issue with both of them would be that they can get in over their heads because they rush in without strategizing or waiting for backup. That's what Scott would need to take advantage of.