What also bothers me here is that in the scum!shraeye scenario you posit that scum!raerae kept it calm under pressure and did the thing that benefits her team. Yet in the town!shraeye scenario, you suggest that she's panicking (when there's no reason to panic). These are wildly different reactions, how do both of them fit raerae's meta?
Maybe "panicking" was the wrong word? I didn't mean it the way you're using it. I just mean, if raerae's scum, then regardless of shraeye's alignment, her reaction to MiX's claim should be read as a time-pressured reaction to clear and present danger. In a situation like that, you have to make a decision fast and commit to it (something that generally I would expect raerae to be good at). Raerae made the decision to adopt a "don't shoot" stance that would accomplish two goals: protect her team from the venge shot, and make her look townie/keep her from having to deal with the politics of trying to direct the shot*. The decision and the nature of it doesn't change that much based on shraeye's alignment. What changes is whether it was a good or bad decision. If shraeye is town, maybe it's a bad decision. But it's still one I can see scum!raerae making in a high stress moment. Does that make sense? There's no inconsistency of character between the two scenarios. The only difference is whether raerae is reacting to an explicit threat to her partner or an implicit threat, based on the fact that MiX was likely to shoot someone and it was hard to guess who.
*To explain this point a little more, trying to direct the shot is a bit perilous for scum, since if they succeed in directing it at town they then look pretty bad.