I guess that is where we dissagree voice, like you'd I'd ride the smurf ride every trip, even as I got older as the AC was a comfort relief, but once you rode it once, I never felt the need to go back again during the day. Pirates of the carribean is a little different, there are 2 "splash downs" during that ride, the one where to go into complete darkness definently inspires the senses (even though the drop ends up being small, the fact that you can only hear it gets you going) The smurf ride had 1 small splash down, and frankly it wasn't anything to talk about. I'd compare the smurf ride more to "its a small world afterall" ride at Disney. I could never envision riding that ride twice during a trip. The Haunted mansion is much more emersive than the smurf ride ever was. Between the elevator drop and the projected ghost sitting on the seat with you when you go past the mirrors, it gives last memories, but again its not something I'd personally do more than once on a trip. If my son wants to ride Boo Blasters 3 or more times on a trip, unless the lines are long it doesn't really bother me much, at least I can always aim for a better score. Another thought to consider, a boat ride like Pirates or the Smurf ride can be hard for some people to get in or out of, its a fairly sized step down into the boat for some older people, Boo Blasters isn't as bad, makes it a little easier for grandma to ride with grandson.
All that said, I'd still love another dark ride, I just don't see the need to get rid of Boo Blasters, just the need to improve the experience a bit. Heck, if they just made sure all the guns worked each time, every car, I'd be happy.
I wondered the same thing about the skeletons at the end when my son first rode it at 2 or 3, but it never fazed him for whatever reason. It does seem like a sharp step up from the rest of the attraction in terms of scariness.