^^^ This ^^^ well said, and pretty much what I am doing, as of last year.
I'm still going over the data, but I saw some interesting results. Out of a dozen Silver Gray Dorking hens and 2 cocks, only 4 hens produced any pullets worth keeping. The 2 best producers of that subset also produced the only cockerels worth keeping, with the exception of one hen who only produced males and the best males at that.
Overall, I'm seeing better size and weight in the pullets. Most of the keepers are a pound heavier than the hens that produced them. Unfortunately, not the case with the cockerels, even though my largest hen produced the best type cockerels. I'm really disappointed in the males from last year, overall.
Before I was using the SOP, my flock developed tail angles that were way too high. So, I used a cock last year with a much lower tail. He has good length of back, and good type, but also one almost duck foot and a brush of white on his lobes. But I used him because he was my only option for lowering the tail angle. I hadn't been paying much attention to position of toes since type and size has been my focus. Now, I'm regretting that because almost all my youngsters have toes that point to center or have one duck foot. In addition, all the cockerels have a brush of white on the lobes. I only have 2 females with all red lobes. One of those I would cull if it weren't for her red lobes because her type is not as good as others.
So, I'm finding that I have some pullets with one trait that I need ie good feet or red lobes. I keep them because I hope that I can integrate that trait into the flock. I get a little frustrated because I feel like I have a lot of individual puzzle pieces but no completed puzzle. No one bird has all the traits that I want to meet Standard with none of the defects or dqs.