The graphical updates were moreso a mockup of what could be. While they aren't the finalized designs and everything is subject to change I feel the main bullet points of said changes are al followed.

. Better Lighting textures so that the facial features look more defined/reaistic and less "nightmarish" in certain light. Even with the simple changes made to the amount of light hitting off the character it looks 10X better compared to the current design.

.Improved hair textures, less grainy visuals, removal of pretty much any blocky looking texture but of course they already said it wouldn't be a 1:1 conversion. So the game is gonna look a bit weird when you play in the older expansions.

Basically 2.0-6.0 series will have a mix of high def and low def characters as they don't have the manpower to fully evolve all the character designs however moving into 7.0+ odds are all the characters will follow the high def look(at least one can hope otherwise that would be really awkward to play through). Since I can understand them not fixing everything but moving forward they would focus on it, but it would be rather jarring playing through 7.0 and seeing dif character textures standing beside one another.