brutal
hahaha, theres not too much to be brutal about, you seem to have the guiding down pat and the FF is doing its job flattening the field.
If you can guide for 4 minutes, hit 10, the difference is amazing! and the ed 80 needs that extra time open.
Processing, keep your eyes on the histogram working with levels to expand the individual channels R,G,B. and also keeping them aligned. Opening up your image the red part of the histogram was double and can be seen in the darker areas and red stars. the rework still shows those lovely blue/yellow stars but allows the other colours to come on though. if you have a look at my eta carina there is purples, pinks, reds, blues.
I call it aligning and expanding the channels it gives you powerful control over colour and saturation.
Ive added in a before and after hope that helps.