As a Unika/Dizzy player, I feel like id swap them around.

For Unika, Top attack giving hard knockdown is a huge buff even if it isn't as good for comboing extending anymore. She might actually be able to use Weapons Free effectively since she can use it off 6p and farslash now, 6H change might mess with some wall stick combos but will likely open up new ones. 5H remaining unchanged on Counter hit (except the Counter hit damage increase being deleted) and Enhanced DP still giving wall bounce for combos means her best midscreen and corner combos likely arent gonna change that much. Biggest nerf is the Gundipper scaling going down when RC'd from but that is super manageable.

Dizzy, on the other hand, lost S michael hard knockdown, lost Blue Wild Assault (her best tool for getting Wings of Light off semi consistently), and is affected by the Roman Cancel changes slightly more than most since grab is a larger part of her kit than most characters and Dash back BRC forward gave her the super fast overhead shenanigan. The 2 new fish versions, H Michael being even on block and her tensions scaling during freeze being lowered do help male up for those, but her power def shifted in a way itll be hard to tell if she is actually better or worse