What do Blu manufacturers have against great classic cover art?

[Whirlygig]

They are trying to sell the film to as many people as possible. If a film looks obviously dated (by old fashioned cover art), it may (nay, will) turn off younger buyers for obvious reasons. If they can make it look fresh somehow, more modern, and more exciting, they will try. If they can trick someone walking through the store into thinking it is a newer film, they want to do that.