Good thread idea. I've got a couple right off the bat. 1. VOYAGER having the Starfleet/Maquis conflict resolved after only a couple episodes. Not saying it should last for years, but at least a full season can be mined from the idea. 2. TNG... not bringing back Pulaski. Even if not as a regular, at least an appearance or two. "Ethics" is an obvious choice for a reappearance. 3. ENTERPRISE... not having more of the Tellarites. While we started to scratch the surface with them later in the series' run, they still got only a little bit of a spotlight. They did a wonderful job with the Andorians, and I feel that if they got a season 5, we could have seen more of the other founding member of the Federation.