I think maybe the pattern companies are going back to the old days when knowledge was assumed.
All of this is before the acquisition of the new company, and between McCalls Co and CSS Industries information, so it MAY be outdated. (I also have no bought a pattern since they sold it.)
They hire right out of college pattern makers frequently who need the experience since they have none or minimal in the industry, and pattern making isn't always as through as it should be in college. (Or it used to be, I haven't been in the headhunting stage for a while now.)
Walk a pattern sometime from any of the big 4. It's scary how bad they actually are. Last one I used, the notches didn't line up, the dart didn't hit the bust point (I had to raise them for a size 18 something like half an inch, and my girls aren't as perky as they used to be), the front and back were off 1/8" or so...all things that have to be corrected before you can sew.
Armholes...well, RTW gets away with crappy ones, so they think no one knows how clothes are supposed to fit now, and often, they are absolutely correct. I hit a point where I have a draft for my own armscye and sleeve cap and completely ignore theirs.