hm, I wonder if that’s because the initial episodes of the Dream Season were high-quality, before Angelica and the emeralds took over..
Yes, the first part of Season 9 was perfectly acceptable, until mid-year when the plots stopped coalescing, and Katzman called it "a woman's show," the series taking on the rambling tone resembling a daytime soap. (The women became weaker while the new producers pretended they were making them stronger).
DALLAS has been called, seriously in some corners, "Shakespearean" -- but the Shakespeare came from Paulsen (who really
was a brilliant constructionist). Yes, Season 3, which ended with "Who Shot JR?", was brilliant as well (before Paulsen was there) but DALLAS was still fairly new, and the writers were figuring out what their show was about and what it was going to be... Paulsen was brought in after that, but the more control he had over the scripts, the more biblical DALLAS became.
At least, Katzman had the instincts to see Paulsen's skill and ceded a certain narrative power to him.
And the two greatest drops in DALLAS' quality happened in Seasons 9 and 12, immediately after Paulsen's two exits... I can forgive Season 11's problems, because there was no spring hiatus during which they normally plotted out most of the next year's storylines (Lorimar thought there would be an industry-wide writers' strike in 1987, although it would be delayed by twelve months) so they had to write as they shot the show. Obviously, that's a problem, and the pacing became a problem among, other things (e.g., Laurel Ellis, too much Jack Scalia, Pam's clunky exit).
But as flawed and imperfect as Season 11 was, it was the last year DALLAS felt even remotely like DALLAS.
Art Lewis in Season 12, and silly Howard Lakin in Season 13 & 14, couldn't make it work. And Katzman let it happen. For three years he let it happen.