I think most hechsherim still use “DE”. Chof-K uses it on many Popsicle brand deserts. cRc Chicago uses it, and so should OU. It would be a lot less confusing.
popa_bar_abba, you are correct. A while back I almost purchased some ice-cream cones labeled OU Pareve. B”H, I have a strange habit to read the ingredients before I purchase a product I never had before. I noticed whey listed in the ingredients. I contacted OU. They made me purchase the product, read them the label and send them pictures of it. They confirmed that the product was indeed dairy. It took them WEEKS to release a bulletin about the mislabeled product!