I don't agree that that was a great post... I agree that in thick cover things may be different and that a dog living in town might not be able to get away with the same stuff in the yard, as a guy that lives out of town, but a good decoy dog is going to be the same no matter what.
It doesn't matter if you're doing ADC work or are a serious decoy dogger, the dogs will be really similar. The end objective are coyotes decoyed to the gun and killed. I have raised several serious decoy dogs that have worked great for ADC guys with the outfit, and I was just a decoy dogger that lived in town.
The cross you talked about COULD produce some outstanding decoy dogs, the only way to find out is to give one a whirl and then you'll only find out if one would work for you, in your country.
I personally love a good APBT, and like a friend of mine said... There are many breeds that could use a good shot of good APBT blood, but none that could help a good APBT!
If you're looking for a good decoy dog and are on a tight budget, try one and see what you get. You'll be amazed at what taking a dog that will listen and handle out decoying can produce, I know lots of good predator control men that have been very successful with collie or collie/X type dogs, because they were hunted and exposed to the right situations and controlled in a manner that would help them speak coyote.
I can list very many more that were unsuccessful with the best bred Striker bred Kemmers that fell short because they were not hunted and exposed right, to make the kind of dog it takes to decoy coyotes.
That being said, I would start out with a well bred, Striker bred Kemmer Cur that has been bred from Parents that do the job for guys that make their living with them, killing coyotes and other predators.
Even then, you'll have to hunt the hair off them and expose them to the right situations for them to start speaking Coyote... Truth is most don't make the grade, even from the best blood, parents and breeders.
At the end of the day it is all about having fun doing something you love! So to answer your question, in my opinion, one of those pups could make a great decoy dog. A whole lot of that is up to you.
Only one way to find out.
Best of luck and take care.