I mean, I understand that it was the thing to do that Pebblesorters would endorse, that part isn't startling, but I didn't think you endorsed that "Pebblesorter::(should, right, moral, etc.)" way of speaking.

It does seem to be change. In past conversations about his 'should' definition he has advocated 'would-want' for this kind of concept and carefully avoiding overloading 'should'.