Chaeyeon has all the skills in the world but talent is not the only factor that determines if an artist is gonna be successful going solo. Her popularity has always been on the lower end of Izone and let's be honest, does she have the charms to capture the audience without the help from other members?
I reckon a small group with some one or two other strong personality is the way to go. Obviously big group is a no no, and she can be successful solo but it will be really tough. I think it depends if she gets a good song to start with or if WM will be patient enough with her if it doesn't hit off big right away.