Bigkidz-
As far as I know, nothing has changed. Rick has added 3 models of further refinement and performance beyond the original CT-1(Enhanced, Ultimate and Ultimate Reference). In addition, as people are finally starting to listen to Rick and break them in for the duration he recommends, they are achieving much higher performance levels than when they originally put the cables into their systems.
There may or may not have been small running changes over the past several years as production evolved with the highest performance cables, but those would have been barely noticeable, if at all.
If you are talking about his earlier beta test cables, then yes, they have changed considerably for the better since then. That is the purpose of beta testing. Hope this helps.