No... believe it or not Yune, was in more of a state of balance than Ashera. When sealed within the medallion, she spent the entire time being sung to by the heron Laguz, beings of pure order. They sang comfort to her, and because of that she was kept in check... to a degree. Ashera had sealed herself off from the rest of the world.

Yet... Yune I think knew the danger that she could be... so she left our world after we defeated Ashera. She said that maybe one day she'd return to us when we needed her most, as the whole goddess she once was.