Yes, this is an improvement, and yes...you can end up going in circles. But how else can you learn, except to play with it?
Suggestion: I'd like to see the lighter tones made lighter. In other words, increase the contrast in the lighter areas, without breaking the mood, of course. It's a touch flatter than it has to be.
In Lightroom, this might mean selecting the upper half of the frame with the Gradient tool, and applying some combination of increased Exposure, Clarity, and/or Contrast.
There are also the four tone adjustment sliders that sit under the curves display...those are worth playing with if you haven't already.
Note: I find it helpful, when experimenting with different possible Develop treatments in Lightroom, to create a new Virtual Copy for each new approach. That way you can easily scroll between the different versions and quickly compare them.