Considering that Rian Johnson contributed and collaborated with Claudia Grey when she was writing Bloodlines, I'm pretty sure it's canon. Just because it won't be completely relevant to the future films doesn't change that.
this is what i like to call “fansplaining”, when someone who didn’t read my tags on a reblog chooses to anonymously address me, a film grad student raised on Star Wars during the Dark Times (‘85-‘95), as though I were the OP and inform me that I don’t know shit about that which I am speaking. don’t do this, guys.
nowhere in my tags did i say “Bloodline’s not canon.” my point is that many, many SW fans, perhaps the vast majority of them, do not really care about anything but the films. anything in those future films that might contradict current supplemental “canon” material is going to supersede it. I’m sure the Lucasfilm story group is trying very hard to avoid this, and therefore inadvertently creating another Legends-sized mess, hence Rian dropping crumbs when he hasn’t even made the film yet, but this shit invariably happens with shared universes and multiple storytellers (especially when you have different modes of storytelling involved) where everyone, despite referring to the exact same guidebook, is bringing a different perspective/bias to the table. (this happens in television ALL THE TIME.) imo this was why Lucas wanted full control over the prequels—because that way it was fully *his* unadulterated vision, even if the outside tinkering on the OT from people like Marcia Lucas and Kershner is widely regarded as having improved it.
Rian, furthermore, is still working on Ep VIII and as far as I know, hasn’t yet written IX, which he isn’t directing. there will be extensive editing and post-production work involved. there will probably be reshoots. there have already been rewrites. we may have more Phasmas and Zuvios who were supposed to play bigger roles than they ended up with. that’s the nature of filmmaking. it’s not prose and it’s not beholden to prose, especially prose that most of the moviegoing audience probably won’t read, and doesn’t need to read in order to understand the story. unlike other fantasy sagas that started out as books and were adapted to screen, Star Wars was a cinematic saga first and always will be. the books are a nice bonus for people who want more of the universe after the credits roll, but the SW fanbase is in no way obligated to consume them or even accept them as part of cinematic canon.