Aww, see...I'm into them, so I feel like Courtney does have feelings for Z she's just not acknowledging them yet. I think they're adorable together, though, so, totally biased.
With respect to Katie, I agree she's a crap manager, but did she really refuse to punish Lexie? From what I remember, she tried to bring it up and Sandy shut her down hard, then they had some conversation about second chances and whatnot. I feel like Sandy's at fault for all of the drama- including whatever Delaney did wrong on deck. Who puts someone in that position as, like, a make-a-wish kind of moment?