The lingering potion of decay is not re-textured in the official Cartoon Textures pack.
Festive mash-up pack texture for leaves is blurry
Dragon's breath isn't re-textured in the Festive Mash-Up pack
Stonecutter isn't retextured in some official texture packs
Shulker shell isn't re-textured in any official texure packs except Candy
Creative inventory icons (iron sword, wheat seeds, & magnifying glass) aren't changed in any official texture packs
'Steve'/player head isn't re-textured in any of the official texture packs