Creating and importing custom asset

Hello, I've seen a discussion from 10 month ago about this topic but I would want to know where are the development on it. I would love to have the opportunity to create models and integrated them to enrich the library of assets. I understand the sensibility of the IP models but with a solution where these imports would be only individual and not share on the main library until a validation of the models by you, could be a solution. Thanks, Eloy