Below is a 'long' post/reply for those who only like reading 1-3 lines for their information. At least that is how my prior experience works with forum posting the last couple years for non-scholarly forums. I did ensure it was all stated in everyday dialect.
As I have stated before in a different post a while back. As a Black Alistar owner I personally do not like several of the changes, but the biggest one being the hair color. I want the old hair color, red, back this current one is not aesthetically pleasing IMO. This is especially true when you notice how similar to some of the terrain the current, updated, color is. The change to his fur/coat to a more ash rather than black coloring is acceptable, although debatable on improvement or not. Especially when you note the name of "Black" Alistar. All this being said my information is coming from the SkinSpotlights YouTube channel videos including Black Alistar's visual updates.
There are however several changes I do like such as the 'loin cloth' changes, the hair style (not color) is better, and the horns are an interesting change arguably an improvement. I am also very grateful you have not changed his gameplay, thank you for that.
I understand it is far too difficult to please everyone with these skin changes, updates, and creations, but it would be nice for opinions of others to be considered. Especially if it is of a skin no longer available, and has a statistically uncommon, if not insignificant, active player owner base when compared to your overall player base. I do understand that my comment will likely be disregarded, or not even read, due to how much information is received.