I like the realistic approach, but this feels a bit sudden, narratively speaking. All her work and the work done on her was all contained in a single chapter, felt like all the build up we felt just got put into our laps in the most anti-climactic way, like her deciding to actually becoming Goldfinger took longer than her actually becoming Goldfinger. Also it'd be nice to know how long this took.
I'm not gonna shit on the series just for that though, I really wanna see where this shit goes. I wanna see everyone's reaction to this shit, I mean this probably wasn't an instant process, her best friend and that upperclassman of hers had to have seen her slimming down at some point, she is a student and they're in her class. Maybe that'll be explained later? It would be pretty fun seeing them be surprised about it.