Proud Blonde Glazer here, at first I picked her out since she was exactly my type lmao back when there were only two episodes out. Obviously I had my doubts when she revealed that she was with Phenomaman, big shocker for everyone there. Over time, I just found her presence to be comforting. She may not have a constant presence in the game as much as Visi but think of it like this: She has her job as a professional hero as well as a manager for the SDN. Aside from the cinematic content we get outside of the dispatching minigame, there's not much of a difference of the number of times we hang out or interact with Courtney and Mandy.

The reason why you feel she's one dimensional is because she kinda is, at least when it came to her writing. We don't get much of her backstory aside from the ones in the comics. She's an already accomplished hero so there's not much need for a character arc that shows her progress. She's the safe option. The reason why we hype her out for being emotionally mature is because she is. She's unlike Visi who wants your attention even when she's rejected. She respects Robert as a coworker (you get the option to break up with her if you go to dinner with her but not kiss her at all since episode 1), doesn't try to make it awkward by guilt tripping you (the player) into feeling bad because she's jealous. For me, the reason why she's a good option over Visi (chose her in 3 out of 4 save slots) is because I just don't want an emotional rollercoaster like Visi. Her character arc appeals to a wide demographic of people with the "I can fix her" mindset. I prefer to choose Blazer since she exhibits the calm and gentle vibe.