In my opinion it would have made more sense to just release all of the volumes at the same time...
In a perfect world, absolutely - but keep in mind that volume ONE alone is nearly 4 hours, with 30+ moves. That is a massive undertaking to shoot - let alone to produce and edit. If we had waited until all three volumes were completed, this wouldn't have been released for a looooong time. Further, it's a sequential series, so we thought it appropriate to release piece by piece.
That said, all three volumes have been shot, and the second volume is in the post-production process as we speak. Will post update whenever available, but we are in no rush as v1 was just unleashed.
