Personally I agree on the tail angle being set much lower. I definitely like the English type a lot more than the American Bantam type. But with that being said, this isn't England. I don't know of a lot of people with Orloffs but I doubt many of them are bred for English type. The people who do have them likely breed them to the Bantam Standard.
There is a lot of time between now and their recognition, I wouldn't bank of them being accepted anytime soon. So a reworking of the tail angle is not out of question. But I think it would be best to leave the angle at 70 degrees. It can be accomplished easily. I would just try to steer clear of the Head/Tail bisect wording. That would make breeding a good Orloff a bit rough and would really take away from a judge's perspective on how the bird should look.
I would ask a Sumatra breeder who judges; how do spurs fit into the judging equation? There is a man who lives fairly close, Carl Fosbrink, who I respect highly. He had, in my opinion, the best birds in the country that have been and ever will be bred. He had Sumatras and bred them religiously.
I really want to see how that Mottled turns out Julio. Has anyone else gotten any Mottled birds from the parent stock before they were taken by the coyotes? If not maybe get into contact with Yellow House, they have some RC Mottled Anconas which may be a decent start for continued breeding.