I would rather them introduce new characters instead of just milking the same ones over and over again.
Part of the problem (as I see it) is that you have to weigh moving forward vs. selling books. Is it really a Star Trek: The Next Generation
book if there's nothing left from the TV series there? Same can be said for the other series except for TOS. Which has a defined box it can play in. But even though its in that box, it seems to be the best-selling of the novel lines.
I've long been a proponent that Pocket needs to not only be publishing books that carry the stories beyond their TV series roots, but they also need to still be publishing books set during the various series.