Also on TotK, slightly behind you. Finished the fourth regional quest but haven't reported back to Purah yet.
!Spoiler alert! My plans are to do that, then the Korok forest, followed by the extra tear and the fifth sage (who I had stumbled upon before even finishing my second temple). Then I'll just... dick around for months instead of going to the castle. :D
I really like Heaven's Vault, but haven't managed to finish it. The world-building and atmosphere are incredible.