When I redid that world I remember doing each lot and taking out the black trees replacing them with normal versions thinning out the areas of excess overdone areas and the dark versions of hydrangea etc replacing them with normal.Plus is quick to take the houses exterior paint and siding and replace them in like 2 seconds.Afterwards I just made multiple saves and it was a huge difference without having to touch world editing areas.I dont use mods for lighting etc and it looked really good.
Sure it takes a bit of time but afterwards you can play your fixed version forever.
