Agreed on this point. The movie version of X-23 in "Logan" was very much like comic book Cass. They're pretty similar characters in a lot of ways.
It'd definitely be more faithful to have gone in that direction for the BOP film with Cass, but I'm okay with trying something different, to emphasize something besides her as a "feral" living weapon. Again, who knows with the movie but I'm trying to keep an open mind about it.