Yes, Raising Steam wasn't good. Did the Discworld need steam? Felt shoehorned in and just not an interesting direction. What happened to the dwarf stone that rotated with near infinite torque? That could have been the power source of a Discworld industrial revolution, if it was going to happen. More fun to explore there.

I still thought it worked as a fitting end for many characters.

Maybe. I guess I feel that the characters didn't need a fitting end. They were established and they just existed. There was no overarching story that needed wrapping up.