You may want to check the mockup on the Withered thread.
Things can change. It would be very easy to imagine this questline leading to the reconciliation of the Night Elven Dark Rangers with their kin through Calia’s meddling.
Besides, honestly: once Sylvanas is gone, why would the Night Elf Dark Rangers want to keep fighting for the very people who killed them and their families, burning their home tree?
She may have been persuasive to start with - we have seen how she was willing to brainwash the recently-raised undead to her will regardless of it being against everything she is supposed to stand for - but things won’t be the same now that she is gone.