I think given that his packages will not be considered perfect - until they have death and decay animations - it is unlikely that he will do anything else (for example, protoss), since his work will not be appreciated due to the lack of animation of death and decomposition.
Yes, he could learn how to do these death and decay animations, but he was not even given advice, information and instructions on how / and where to be able to do it (in which section on Hive, in which topic, etc.). But they simply demanded and said that it was not very ideal until there was an animation of death and decay.
I understand that this is a true thought, but if it is true, it does not get better from this. Renn himself probably knew that the models lacked this, but apparently he did not have much time, or energy and inspiration to study the creation of these animations, or anything else. But then he provided such amazing models, working for WC3, in incredible quantities. And I'm sure that helping him in the animations of death and decay will not be superfluous at all, instead of criticizing