It's no secret that she's been treated quite poorly there and has even been assaulted by the students there on numerous occasions which has resulted in no real punishment despite them actively working for evil or even for selfish reasons as well as being verbally abused by both staff and students. Not to mention how many students and staff openly speak harshly about her father in her face and even rubbed it in that they hoped her father would be killed for being controlled by the Phoenix Force. Than there's how most JGS books tend to portray her badly or utilize her in ways that reflect poorly on her to prop up other characters or make her a joke for cheap laughs. The main books that have treated her poorly at the school have been W&TXM, SM&TXM, Wolverine books(That she appeared in) and Amazing. Even Nightcrawler didn't really utilize her well as she was KO'd multiple times thus preventing her from getting to do anything course that does fit CC's previous writing...
Not to mention her near absence in nearly all events that includes the JGS. She didn't even featured in AXIS outside being treated like garbage, even BoTM event treated her far better and that was Bendis's event. She was also cut nearly completely out of the Avengers vs X-Men TPB.
Heck, Bendis apparently doesn't even like writing her but he did a better job with her in Uncanny than in those books. Than there's the Storm solo which treated Rachel fairly well despite her not even being a main cast member there. While X-Men was the main book that actually has utilized her well and besides the freaky Sublime stuff she got a lot of character development growth as well as a new direction on wanting to be a Leader now.
Kitty even left the JGS school. Kitty!
So, is it now time, after the latest insult that is SM&TXM, for Rachel to say that she's had enough of that abusive environment and go join the NXS, X-Factor, X-Force or even join Kitty in space after Secret Wars?