For the most part you answered your own questions, not every dog is gonna be show quality. If I have a dog that does not meet the ABKC standard then I'm not going to show it.
In my opinion this dog carries more of the UKC APBT breed type than an Am Bully, so I think it would have a better chance in the UKC.
Neuter/Spay and enjoy it as a pet. Its not the end of the world if the dog cannot be shown, you can do agility, dock diving, flyball etc. Lots of positive activities owners can still do with their dog.