In principle, I wouldn't be against including the Chakuun. But it seems that ship may already have sailed, since it would be hard to explain their complete absence from Vanguard
and the Typhon Pact narrative. Also, the story that features them also depicts a version of Pike's father that's irreconcilable with Burning Dreams
, and I think BD is considered part of the main novel continuity.
Of course, there are some parts of Early Voyages
that have been referenced in the novelverse. Notably, Chief Engineer Moves-With-Burning-Grace is part of the Lovell
crew in SCE and Vanguard
-- and is actually in Burning Dreams