I personally also don’t agree with making the first two movies dark like the later ones.
They were perfect with their rich, colorful, and whimsical tone, perfectly in line with the first two books.
And Prisoner of Azkaban should have also been made in the same style. I know that I wound up falling in love with the Prisoner of Azkaban we got, but I still wish the tone of the first two movies could have continued for the later films. Maybe somewhat darker, but not all way into the direction they went.
JJ, if you decide to release your own extended editions of movies 1 and 2, I’d love to see that.