Silly premise as with most horror films, but I somehow made it to the end and found it very meh and unsatisfying. The changeling was a victim as well, and if he supported his father's murder of Joseph it was more likely because the latter made him so I don't see why he should bear any responsibility, but then again ghosts are stupidly vindictive.
I found a copy recently and watched The Changeling last night. I was expecting something with a decent eeriness like "The Sentinel" but instead got this boring dud.
Much of it I really liked. Loved the ghost story parts early on. But around two thirds in, when the senator comes into play, it very much drops off and turns into a more regular thriller with some horror elements tacked on. The later part of the movie was very disappointing. A 7.3 is actually an appropriate rating. But it could have been a lot higher.