Yeah, there would have to be something for her character to come back to. It does seem like she and the show have both moved one.
I just wish they would at least
mention her character. I mean... Kenna was one of Mary's best friends and Bash's wife
who he loved, yet we've never heard them speak her name since she left.
The only thing that gives me hope is...
Spoiler:
the fact that they have said Torrance could be returning as a guest star. If Bash can return for a few episodes, perhaps they could bring Kenna back for an episode or two if Caitlin was available.
Maybe it's extremely unlikely, but anything is possible.