Right?! At this point in think a better end game would be for Adachi to end up with the childhood friend (who's name eludes me at the moment), they can bond over the scars Shimamura is going to give both of them.
Call me slow, but it just occurred to me that each love interest is based on one of the 5 senses...
Shirakawa Riri - Touch, Mei's touch lingers with her and she envied Minato getting touchy feely with Mei.
Todomeki Maria - Sight, she likes to read Mei's expressions and extract her thoughts...