I agree. If a movie is good, leave it alone on the DVD and Blu-Ray releases. Put in an extra features section, show lost scenes there, have commentary tracks put down by significant actors in the movie, etc. Sometimes the commentary is just gold, like the one for Used Cars. Kurt Russell was having a ball telling stories behind the various shots, inside jokes, things I never noticed etc.
I loved that movie. It wasn’t until years later that I realized it was directed by a young Robert Zemeckis, who went on to much greater (if less wonderfully raunchy) things.