Interestingly, with those Disney films, the VHS versions look BETTER than the digital "new" ones. I don't think the quality of the original film had anything to do with it, as Disney probably has more than one archived film copy that has perfect detail. I think they just messed up in their "enhancement" process. Colors are more vibrant, but details were lost.
I won't post links or pictures here, a simple Google search is all you need. One example: In the original film Beauty and the Beast, when the Beast first makes his appearance, they purposely made him dark in shadows. It adds suspense. In the Blu-ray, he's perfectly visible and colored. It ruins the suspense completely and really does make a negative change to an Oscar nominated film!
What were they thinking?