In many ways, she is, in terms of romantic awareness, about as bad as, if not worse than, Yamato's worst moments near the start of the story. She knows he's already with someone, but she can be absent-minded about that relationship status. Just like Yamato was oblivious of the implications of him hanging out with Suzuka while he was still dating Honoka, and the fact he looked so much happier with the one he wasn't actually dating.
But now Yamato is a bit more mindful about the one he's supposed to be with, and we have a worse female Yamato that can't run, can't cook... why did people call her 'stronger' than Suzuka? What is she actually good at, except causing misunderstandings and stomachaches?