Is remastered mainly just less jitter?

" "Dark Side of the Moon ... there is one VERY famous remaster that totally kills it dynamically and sound effects-wise"

is that the one Barry Diament did? "

I believe you are referring to the remaster that Tim from EAR did as one of the first recordings used to market SACD. Personally, I never cared for it. Very boring to listen to. All the life was sucked out of it.