I used it for the first time last year and it was worth it. I am an obsessive picture taker, and MM freed me from that; I found I could just let it go. Also, I was traveling with a tween who was just entering the "don't take my picture anymore, ever" phase -- it's not just the little ones who can give you fits. The MM helped with that a little, because some photographers have a great, welcoming personalitymthat invites cooperation.
I see that you've decided to get it, OP, but I might have missed any posts where someone answered your question about rides that have pictures. I think Buzz, Splash Mountain, Big Thunder Mountain, and Seven Dwarves' Mine Train are the only ones from your list.