Like I've said before Makel, she just went from a street bum living in a garbage can. To a welcome fellow "goon", with new friends (so to speak), living a floating mobile castle. Put yourself in her position and I'm sure you behave in a similar fashion if not more "subtle", reflecting on your high intellect (being honest here, no sarcasm my friend).
Also, I guess it will take a bit of time for both Rae Mix and Tristie to "adjust" to their new positions (Tristie more so seeing as she has to teach Rae to tricks of the trade when working for Sombra)
I don't know about Makel, but if I was in the same situation as Rae, I would initially be very quiet and reserved. It would take some time before I start feeling comfortable around my newfound "friends". But maybe that's just me.