I think I used respec last week on my azata but I didn't change any of my mythic path stuff just my regular class levels.
How does this bug represent itself? I haven't really had any issues
After post-Drezen respec some endgame mythic quests have issues with uninteractible NPCs, non-working triggers (such as teleport to prison for demon) or non-working UI elements . Most of these have been fixed by the patch, but not all of them can be repaired in your save retroactively. Still, as Azata chance that something will break is minor.
Crusade problems are most likely a different thing.