Electabuzz has never been OU in my recollection. Chansey, Rhydon, Magneton, Dusclops and Porygon2 are the only NFEs that have ever been OU, I think.Is think wynaut should be at least NFE because in ubers it can't even stand an attack from the powerful ubers(unlike his older brotha, Wobbuffet, who has a shitload of HP), so his uber ability pretty much a waste.
It's pretty obvious that Electabuzz and Rhydon will be the most useful NFEs here, they were OUs anyway, and i'm sad to see Vibrava outclassed to other dragons, just like flygon was.
And, you can read a thread in the PR about why Wynaut is Uber. For something to be Uber, it doesn't have to be useful in Uber battles. Likewize, a Pokemon can be useful in Uber battles (Forretress, Blissey, Scizor, Metagross, Tyranitar, etc.) and not be Uber.
Also, I can't see much benefit from using Vibrava in NU when Gabite is available.