I absolutely hated the direction they were taking Jaina, but if BfA did one thing right, it was righting that wrong. I still think she needs to cool it, but at least she's not absolutely mental like she was during the end of MoP and since.
As far as making it into a movie, idk. I feel like they'd just fuck it up and do something stupid (like make another live action movie for some stupid reason). Taking an originally animated/not live action thing and making it live action tends to ruin it (Mario Bros, Avatar Last Airbender, idk the fucking WARCRAFT movie?).