With one exception (and we'll get to her a ways down the road), every girl is good enough to win in another book. Hell, they even help each other out knowing full well it'll hurt their own chances just so he gets the best possible match. There's clearly no non-mono end available and we know from the title where it's going, but none of the main four would be problematic for me as a reader.Look, I'm perfectly fine with the main heroine winning, but would it be too much to ask for a what if chapter with a Tennouji ending?
Shizune has her own things going on, which will be covered eventually.Hell yeah, Shizune best girl. Need more mangos where the maid wins!