This thread is for ideas for improving space.
I'll start this show: remove z coordinate. Now, this literally removes a dimension from the game, but I have some good reasons. It's completely ridiculous to represent three dimensions in text. Another issue is that planets within a star system are generally within the Galactic plane. Removing z would increase the chances of encounters in space(feasible blockades, meaningful asteroid fields) and allow us to graphically represent a star system(in both ASCII text on the MUD, a Google-style map on the website).
Less thought-out ideas: gravity well generators, fleets, ship mods.
Thoughts? Other ideas?