The inconsistent, sometimes weak art is a shame, but I kind of like the character interactions. Seeing Mina get along with someone other than her brother is nice.
I find myself rooting for Mina to become friends with Sayo, but I guess that would resolve Mina's character conflict too quickly, so it's probably not happening soon. I'm kinda surprised Rio is up for cooking a Yuuki x Yui wingman plot with Mina, didn't she like him too? Might be remembering wrong, but I guess she gave up already.
I suppose the core conflict really is Yui's bad reputation, it's the biggest obstacle blocking romantic progress. At this point is it really fair to say she's still popular? Or unpopular because of that bad reputation?