@SuperOniichan I'm sorry if my yuri goggle annoys you. (I really do, it's just my old-hard-to-get-rid-of habit)
Even without interpreting their relationship as yuri, I still think their attitude towards each other are difference. You can see the way glass girl treats Homare as a teacher, tomboy thinks Homare as a bestfriend (literally, no yuri implied). And to Shion, it is more like a strict instructor or something. It's almost the same from our MC too, Mutsu and Asuka more like really good friends to Homare. But Shino is a bit difference, from yuri fans POV (liike me) it is more spoiling-relationship which leads to a shipping stuff. From common people, it's likely Homare doesn't know how to handle the girly from Shion so she tends to do everything Shion said. (this one still leads to the fact Homare's quite gay, but more less)
The reason you see Shion has changed so much because her personality from the beginning is way far from fact that it (princess trait) could help her adapt the the situation for surviving. So when Shion changed, it becomes a big development. Think about Mutsu, the four eyes is sure boring but her role has served well the purpose of this manga, how-to-survive theme. Moreover, like I say, Mutsu is a thoughtful person. She always does her best to keep things in the team balance, relationship, surviving. Remember when she keeps Homare company in the rainy day chapter because the other two could get what Homare talking about? She is the balance character to make sure the team can always divides equally in 2 - 2 ratio. On the other hand, Mutsu also save MC once when try her best to come up a solution to get Homare out of the well. Recently, she has become the 'mother' role while taking the part of securing the food for team. Last but not least, even Mutsu's POV has been opened in a few chapters. With these points, I believe Mutsu is the next capable POV for the team.
About the POV on the almost equal-gender team. My point is the same to you. For now, it's hard to see the Daddy POV, but I still hope for a change to see it. It could be very good chapter, maybe.