They would make her really, really, broken. I mean, her music can attack the very soul of a target which is a method of attack that no amount of physical protection can defend against. This is pretty much an outside-context problem against any sci-fi or fantasy work that doesn't have any interaction with souls.
Then you have the problem that Ling Qi can bypass any purely physical barrier, and containing her in a purely physical manner is almost impossible.
There is also the problem of how to contextualize the fact that Ling Qi is in the Green Realm and how that stage of power stacks up to any other universes stages of power or even dealing with mortals.
All in all, Ling Qi is difficult to evaluate against other characters from different universes and would either destroy them or be destroyed in turn (by the likes of minor gods or other similarly op characters). So yeah, people would make her broken.