I thought you were going to end with Macross Zero being in the Macross 7 camp, and I was going to cheer, but then I remembered Zero has one more episode, and maybe I will like 1/5th of it or something.
You can have the same problem with any series, drag it on too long, or try to change it too much (Star Trek Enterprise), and you lose a lot of the appeal, but then again, if you were working on a show, would you want to do the same thing over and over?