Well, you had people 2 chapters after the main couple got together, asking for the relationship to "Move forward".
Again, only 2 Chapters after. It's clear that some folks just want to see 2 girls making out and that's it, instead of having a proper story with a well-developed cast of characters first.
Not that I wouldn't mind seeing the main couple being lovey-dovey, that's why I read Yuri, but this manga is not only about their relationship, or Asako's past relationship problems, but also about Miyako's past life as an idol, and the 2 characters that are being the focus of the story right now, are an integral part of these sides. (Mangaka being a listening ear to Asako in the past, which is why the roles are being reverse now, and Ruri pushing herself to the brink to fill the hole that Miyako left after leaving the group), so the fact that this subplot is surprising some people, is quite something lol.