Great update, but there is one thing missing for the adaptive layers.
A Max Layer Thickness Option.
With a 0.4 Nozzle i never print thicker than 0.2mm
Default Layer of 0.2 Layer, and a Layer Variation of 0.15 it goes up to 0.35mm Layer thickness.
So there should be an option to only print thinner Layers so it won't go higher than the Default Layer Height.