And I still stand by the point that having Gimli's attitude remain the way it was in the book would only add fluff, with someone like Frodo having to ask "What happened in Moria?", leading to giving the audience unnecessary information.
But anyway, this is on a tangent. But it does illustrate how changes need to be made in adaptations.
As a member of the audience, I'm only left confused by the whole thing. Why doesn't Frodo ask what's up with Moria when you have one person talking about a royal welcome and the other terrified? Especially when it becomes his job to pick ("Let the ring bearer decide."). The whole thing makes no sense and only creates confusion, and it doesn't make Gimli look like a very deep character. And a line or two about "Balin's efforts to reclaim Moria" wouldn't really be any more out of place than all the other worldbuilding that doesn't matter anywhere near as much.
I can drop it. Certainly films need to be adapted differently. But film makers can screw it up, too.