Mariah Bell is a PCS skater. She can still do well even without a 3/3 in her FS, as long as she skates cleanly. Her 4th place at Worlds is a testament to that.
But when it comes to a second lady for Canada, Kaya Ruiter may seem to be the most promising, but she's been away from competition now for almost a year. During that time, she may have gone through another growth spurt, so there's no way of knowing if she's still capable of performing at the same level she was in her junior career.
Gabby has been working on regaining her skating skills, and 3 years have passed, with no vast improvement evident. That ship may well have sailed.
See how the juniors do at JW, then you'll have an idea of where Canadian women stand for the future.