Our philosophical thought experiments aren’t good enough and we can do better
There hasn’t been nearly enough work put into creating good philosophical thought experiments, and as a result the ones that we have are either flawed or flat-out terrible. It’s easiest to explain the issues by looking at one of the terrible ones. So, in the footbridge or fat man question...
I'd be very uneasy about any of the scholarship in a book that from your description (and I think at least one other review that I've read) just ignores reality on the Kandiaronk stuff, and some of the other things it discusses. If you know you can't trust them on things they obviously get wrong, can you trust them on any of it? It seems much more likely that if you got experts to review the bits of the book relevant to their areas of expertise, the conclusion would be that a lot of it was worthless, actively misleading, or not even wrong.
Your description of the book makes me want to read it. It sounds fascinating, and stimulating. I just feel like I might learn more by reading a series of rebuttals of their arguments from people who know what they're talking about.