Just with the fact that this is a harem manga, where all of the girls are given good character development, but in the end only one is chosen, but all of the other girls still get perfect closure, it deserves to be called a masterpiece. 10/10, would recommend.
Not to mention that Yotsuba herself is a perfect choice, because even between Miku's supporters, Nino's supporters and Ichika's supporters(Itsuki was never a choice), everybody respected Yotsuba and with that final ribbon scene she gets a perfect close on her character development as well.