Although now with the Story Group they might be at least a big closer to canon. We even found out today that Rian Johnson, the director of EpVIII, helped develop some parts of the upcoming Leia-centric novel Bloodlines.
That's the idea now, but we'll see if it holds up over time. The Dell Babylon 5 novels were supposed to be canonical, but J. Michael Straczynski wasn't able to supervise them as closely as he'd hoped while the show was still in production, so only two of the nine ended up staying canonical, and one of those only "mostly" so.