80s-style cliffhangers are so old fashioned; I really had no expectation for one. I can't think of a single show that uses them. And really, how many of them were even that good? Worse, they lead to a game of one-upmanship where each cliffhanger has to exceed the previous, leading to downright silliness.
I like the modern approach of ending a season: wrap up (more or less) concurrent story lines and leave teasers for the next year. I don't think "Dallas" did a spectacular job on that front, but I was reasonably satisfied.