Yep her solo music have been impeccable so far, both her Korean and English releases are amazing. My faves are Runaway, Not Barbie and Don't Speak.
That's why I want her to move back to US but seems like she's happy as well with musical/drama works in Korea.
I don't know what would be her best option, would it be signing back with SM so she have the facility to create and record music. Because I don't want her to give up her love for challenging new avenues like musical/drama. But staying in Korea will limit her new music recording because she's independent and doesn't have many resources to work with.