I know what you mean. I was dreading the release of Robotech: The Shadow Chronicles, but at the same time I was anxious... so I could find out what happened to everyone. Of course the movie was shit and I wasn't able to find out anything, but I still want closure.
I've come to the realization that it is futile to expect closure in an anime series. I mean, how many shows have the love triangle that ends unresolved, or events just kind of stop and you never really get a chance to see how things turn out in the long run for the characters.
I suppose in American TV we do the same thing, but for some reason I don't get that emotionally invested in most characters on U.S. shows.
As for Robotech, the McKinney novels have pretty decent closure, if you like the direction the authors took the storyline. For R:TSC, I thought that there were licensing issues or some such over using the characters from the original shows, so it was probably too much to hope for to see most of the original character designs come back for the sequel.