Interviews with Moore himself have been posted all over this BBS. I am sure he said it was a "mutual decision", but that information came from his own interview.As such Moore was not a team player on that show and was asked to leave.
Do you have a source for this?
His interviews don't say it was a mutual decision, his interviews make it quite clear that it was his decision to quit because he didn't enjoy the working environment. This was due to feeling like his suggestions were being ignored, his dislike of his script having needless technobabble added to it, and a general dislike of Voyager's lack on continuity. He also felt like Braga had betrayed him in some sense but I'm not sure what that was about, some think it had to do with Braga hiding the fact that B&B were already planning Enterprise without telling him.
On his last day he was given a gift of a real bat'leth that the prop department made for him. I know of nobody who was fired and then given a gift for it.