I kind of like this. The misunderstanding was cleared up, he realized he was being an ass this whole time and apologized, the rival actually helped that happen and did so intentionally (as opposed to some weird monologue thing where she makes the MC feel bad about herself and he overhears), and Umeko is finally able to actually interact with him and bond. They aren't dating, but in a way ending like that would feel too rushed.
Talking, making lunches and eating them, actively trying to get over his fear and get to know her, this all feels like a good win for Umeko.