Infernal Nasus attack animations are buggy
I just bought the skin recently, and it was IMMEDIATELY noticeable. With base skin Nasus, the animations are very smooth and flowing. With Infernal Nasus, the attack animations are VERY choppy.
Also, there is a big similar to the Cait AA bug where you'll see the minion die and the gold will show BEFORE the AA is complete.
There are a few reddit threads on this dating back a year.
http://www.reddit.com/r/leagueoflegends/comments/1rs28v/the_new_nasus_feels_very_unnatural/
This thread includes a video, which I will link, showing the problem:
https://www.youtube.com/watch?v=mCC4Xq3mUxs&feature=youtu.be
This is a REAL problem with this skin. It's a BEAUTIFUL skin, but it's functionality is a bit off and needs to be fine-tuned.