I get what you are saying. It is not as clear as I make it sound, but it is not much more either.
I believe that if you considered the points made in the illustration, you would not end up too far off. Break it down into individual characteristics initially. Avoid, the excessive fluff, and loose feathering. Avoid narrow birds. Avoid birds that taper from shoulders, and show preference to birds that carry their width through. Certainly the Del will have a little more tail (I think they should. The black tails should be a highlight), and lift. But looking at them from above, you are looking for open tails that are not pinched. You can evaluate the rest in the profile.
I do not want to, and I have tried not to, be especially specific in my comments. There is some room for interpretation, and opinion. At some point we decide how we should go. I think if it fits within the boundaries of the Standard description, it is difficult to argue. Then it boils down to opinions on particulars.
You guys do not have the benefits of more established breeds like the Reds, and Leghorns. As you guys move along, perhaps you will make it more clear to those that follow.