D'Lanor, some change is needed to make a better plugin. If we hadn't made huge changes from the alcugs-plugin we would most likely wouldn't of gotten anywhere.
This change was made to make more things possible. There are only a limited number of buttons in blender (it's a sin to use alc-script for materials

) so, we have to make the best of our buttons (and not have things like alpha-sliders mapped to color-hues--we have to make it as sane as we can).
Alpha is kind of a 'feature' and zbuff is really a 'feature' and things are bound to change over time. Hopefully this will be the last 'remapping' of that button.

Currently getting some ink on my hands over at the Guild Of Ink-Makers (PyPRP2).