The writing surrounding Lettuce's fears is inconsistent I won't spoil it, just remember back to the pool episode. I did in fact like how the powers responded to a need rather than contrivances compared to previous episodes, and we finally get the full transformation sequence for Lettuce, you probably didn't notice, but she was the only one not to receive one since her debut. There were hints of foreshadowing, and of forces that even the Mew Mew don't quite understand!