I think it's wrong to chalk up Momoa's comments to him liking Snyder and Fisher. I'm sure he does like them, shit, I can't remember anybody who actually met him to ever say a bad word about Snyder. About his movies, sure, but not about the man himself. By all accounts, he appears to be a very nice man.
And let's not forget, Fisher and Momoa said nothing about the differences in quality of the two versions. Fisher complained about the behaviour of Whedon, Berg and Johns towards him and other members of cast and crew. Now, that you could chalk up to him being inexperienced in the world of movies and Hollywood. But Momoa is not. He's been in movies for quite a while now, and he's been on a couple of TV shows, so he also knows what it's like to shoot on a tight schedule (as the JL re-shoots were). And while Fisher's accusations could be construed as a negotiation tactic from somebody with nothing to lose, Momoa has a lot to lose. He's Aquaman, and he's part of another potentially huge franchise for WB in Dune. Honestly, Momoa's comments change my view on this. I don't know what happened, and if what happened was actionable. It certainly doesn't help that Fisher is so fucking vague.