Hmm.. interesting. TPTB must have really tried to keep the morale up in those last days of the show because it's hard to imagine anyone other than maybe Larry or Patrick really not wondering if 'this' could be their last scene. Where on earth did the show have to go from here, based on the few that were left? It went out with a whimper , not a bang, as was promised in those weeks prior to the finale.
That fact that Barbara is finishing her scene, walking out with a suitcase, but it didn't dawn on her this may be her exit...in fairness, again..we don't know how it was being presented to the actors, especially the newbie(s)..It just seemed pretty obvious to the viewer. Hindsight is always 20/20, but dang.. I'm no expert, but it certainly seemed like a sinking ship almost from the first episode that season.
You had no Miss Ellie. Characters who were supposedly dead, still appearing in the opening credits. Regular characters(Kimberly Foster) that didn't appear until like 5/6 episodes in. Cally, who after....episode 10, was it? was gone until the last few episodes. What a mess. Then there's the ratings to consider. Yes, shows are sometimes filmed well in advance, but by episode 17, I would think they'd have a pretty good idea. Not to mention, if I recall, Dallas started later it's last year..maybe November? So, how far in advance were the episodes that year, or did they just hold off on screening? I dunno.. it wouldn't exactly be screaming job security to me.