Well it has a PG-13 theatrical cut and then the R-rated extended cut which added @20 minutes of content. I don't think anyone's going to finance bringing together the cast from a 13-year-old, run-of-the-mill movie so he can further fulfill his "true" artistic vision. Hell, the CGI alone to make the cast look as they did in 2011 would be cost prohibitive. If he hasn't already filmed most of what he wants to add (like the ZSJL situation) it's never going to happen. Not to single out Snyder (a lot of directors share this flaw), but he really needs to learn how to stick a fork in it and move on.
I think a big reason why some people get turned off by ZS is the perception that he continues to play the tortured genius/victim card and how every movie he releases into the world really isn't the one he wanted to make but a compromise with the studio. Well hey, that's how the movie industry and the world works. He should either accept that or launch his own independent studio where he makes the rules...and takes the financial risks.