Really? I must include this in my
OP.
How does the "Official Cut" differ from Synder's Cut in this respect?
Mostly excises it and turns it into a conflict between Bruce and Diana:
So that he can later have them make up and try to hint at a romance:
I think every part of these two videos is Whedon stuff that's not in the Snyder Cut.
In the Snyder Cut there's basically no dispute, they need Superman, Diana doesn't doubt the team, she leads it and is on board as much as Bruce is.
At the end of BvS there's a scene at Superman's funeral, Bruce covers Clark's funeral cost and Bruce/Diana discuss their mistakes and Bruce begins his search and makes the case to Diana for the League:
Then at the end of Justice League, the relevant Bruce/Diana scene from this is Snyder (I believe in this montage only the scenes with Clark and then the one I'm talking about is Snyder, all three are in the Snyder Cut's similar ending montage) and is illustrative, Bruce again pays (for their house), then Bruce is talking about the table for the Justice League in the abandoned ruins of the Wayne Mansion that will be repurposed for the League, "six chairs." Diana adds: "and room for more." :
Whedon League has the scene but not the narrative arc for any of the characters that gets them from around BvS being completely separate and wanting no part in the world unless it's a death wish like Bruce clearly has to the League they are after defeating Steppenwolf and ready with their heroic purpose renewed to take on Luthor/Darkseid/etc. The obvious criticism should be that Superman's death is a hacky thing to base this around, but I think there's a clear arc there that goes back to Man of Steel and I haven't really ever seen Bob bother with any of this. (To be fair I never watched more than a little bit of his dissertation on BvS since it's longer than the actual Ultimate Cut of the movie.)
edit: Also, to add regarding faith. Bruce's entire impetus for the team in the Snyder Cut is tied to his visions as seen in BvS that helped convince him he needed to kill Superman: "I had a dream, like, I don’t know, almost like a premonition. It was the end of the world. ... I think it's something more... something darker."
Also, also. The team fights Steppenwolf and loses. Then fights Superman and loses. Superman leaves with Lois but the team has no idea what will happen and no time to find out. They still go to fight Steppenwolf again because Bruce has faith Lois will save Superman who he has faith will then come to help. Bruce tells Alfred so Alfred can tell Clark when he comes.
I think the overarching narrative is that Snyder (and Terrio) was trying to find a reason these heroes would come together other than that they're simply good guys and that's what good guys do. I think it's effective because Bruce (and Diana) is in a low place in BvS no longer trusting ("Twenty years in Gotham, Alfred; we've seen what promises are worth. How many good guys are left? How many stayed that way?") with people dying and realizes he needs to completely change his ways to put trust in the team, in Superman, etc.