Well, like I said, it's because I knew everything about Madoka beforehand so it didn't seem so bad.
Tougou is certainly head over heels for Yuuna, people could make some points about Yuuna not being in love with Tougou and just being a really good friend. But yeah, I think Yuuna is also in love with Tougou, it's just her mindset isn't anywhere near love or like. As for Karin, her first story in the first VN more or less confirms she has a crush on Yuuna Yuuna sleeps over at Karin's for a study session and seems like there is a few more moments in the second one, though Sonoko ships Fuu x Karin.
I saw her as someone who value being the best in everything and aim to win no matter what. The type that discreetly looks for flaws in the rules and wisely use it. Also, her haughty attitude kinda reminds me of pure-blood Slytherin stereotype.
Where did you get that ? In the anime she more like a resigned naive always alone (at least at the beginning) good girl. Well she may be hardworking even if I don't remember it that much but I don't get where the flaws in the rules thing come from at all. Honestly, I remember her being very upright behind her facade
For the haughty thing, well that's her tsun protective reflex. I don't know if it's really slytherin... maybe
^^Sounds like an interesting concept but I doubt it would work. The shy girl would be too shy (to make a move) and the tsundere would be too tsun. If that even makes sense. No one would initiate the first move. :<