I created an addon to effectively block all animations related to mob TP moves for a semi-related reason. maybe this could help some of you. Just save it as NoAnimations.lua and make a folder with the name NoAnimations in your addons folder and try to load it.
https://pastebin.com/raw/2jiX7zNs
note that you won't see the "charging" animation with this either, you'll have to rely on the chat log for any indication a TP move is coming.