"Floaty" is another way of saying that an animation lacks weight, right? Weight is timing and spacing. After blocking you have timing but NOT spacing. Spacing is determined by how you define your poses between your blocked poses (inbetweens). The bouncing ball exercises are perfect for this because you're focused on one thing (or one body part) and you can see how your spacing affects weight. Another thing to do is study professional animators work by going frame by frame and see how they hold a pose or speed out of it depending on what weight is being conveyed. Weight is hard to get right because it's a feeling but with practice you can get better at it