Frontier have always gone after realism in Elite (within gaming boundaries of course). The distance for a system to have interactions, missions etc is currently about 20 light years, systems more far away are practically dead, despite being attractive to visit (or now create).
In reality, it would probably be prohibitively difficult to move further from the range of simple ships. Not impossible, but difficult and costly. That should be reflected in game, so that expansion resembles a regular expansion. Think how cities and countries have always expanded, it is mostly around the borders and rarely with far away colonies.
Anyway, great news for the game. What seasoned players need in Elite, beyond things that increase immersion in the world, are new long-term goals. I mean, when you've done thousands of missions, you have a carrier, engineered ships, credits, you have explored a lot, played the Bgs, explored the wonderful flying and fighting model etc.. now new things to go after, great!