While she may never catch up to the rest in >numbers or subs. I still think Sana has a place being a relaxing streamer who does weekly art streams, very much how Ina started out.
https://www.youtube.com/watch?v=lP9YU3PDe8cI still remember watching this live and it was honestly pretty enjoyable. It helps that's she's really good at it too and has a different artstyle to someone like Ina. But unfortunately Sana doesn't seem to quite understand that this is what will help gather her an audience and for whatever reason neglects it. Her design and accent is ultimately subject to opinion. But not playing to your strengths is a true debuff.