I kind of think this would have been a stronger story if QT didn't end up returning her feelings. From the start it seemed to me that SJ aggressively pursued QT while QT clearly wasn't interested. Am I just a downer? Normally I'm all for the main couple, but I see my friends irl try to do what SJ did over and over again and it never ends well.
(putting this outside of spoiler tags now that the relevant content is on Dynasty)
On an intellectual level I want to agree with you, but, well... a similar set of circumstances is how I ended up with my current girlfriend. We'd been friends for a while, she made a pass at me, I shot her down for various reasons, she accepted it and didn't directly make another move but made it clear she was still interested and flirted sometimes, I eventually decided it'd be fun to start flirting back, and things escalated from there. So while it's not something I'd recommend (and honestly, things were pretty weird between us for a while until we sorted out just what our relationship was), I guess I can't say that something like this can never work out.
I agree with those who are glad QT was the one who actually initiated the kiss in the end, though. I think in a situation like that it's important for the one being pursued to be allowed to make the next move, if it gets made at all.