I'm not a big fan of the CGI either. I can always notice it and it just never feels real at all. Imagine replacing the jabba in ORTJ with a CGI - they would be two entirely different things. I don't know if CGI will ever be able to imitate true reality fully, but as for now it sticks out like a sore thumb due to too many reasons to think about. A real presence of a model or person fills a space that CGI only imitates the look of, but really has no physical dimension to it.