I could see that o-ring dampening the pingy sound many stainless joints made. Ray took extra time to do things in his joints to accomplish things he felt important. For instance he drilled all the way through his joint screw so he had no internal pressure when gluing in the joint pin. He made his shafts and butts all interchangeable. He was among the first to do that. He also was one of the first to use a thin wall shorter length stainless joint sleeve. I am not convinced what he did there was a bad idea.
Here is some things I think might help you understand cuemakers a little better.
We are inventors. We try new things. We try to figure out how to solve little minute problems with the tiniest parts of the way a cue hits. We are always looking for ways to improve on the way things have been done in the past. Unfortunately we are also at times quick to criticize the way other cuemakers do things. We are a hard headed group of people who love our craft and strive to improve it. We fail at times. We try things that don't work. But we try again and again, always believing we will make some minor improvement that will help make our cue play better. I trust that is exactly what Ray or his helpers were attempting with that joint.
RIP Ray!