First we need to make a difference between fast player travel and structure fast travel
fast travel player :
what about being able to build a cloning station, you will have to join a cloning station where your body will be scanned, your mind too, the data will be transferred to another planet where another cloning station will rebuild your body and your mind (and of course, the scanning process permanently damages your old body which no longer exists).
It will be in the same way that we will explain how to return from death, by reloading an old analysis of your body / mind, so with perhaps the loss of skill point learn after the last analysis of the cloning station
(nothing new, largely inspired by other games)
That require having your own cloning station at destination point, or paying someone to access his, maybe a company will offer this service, etc...
fast travel structure :
what to do without breaking the gameplay, transporting stuff across the galaxy should be a lucrative activity, because it takes time, it's dangerous, etc ... the ship warp will change a lot of things, and reduce the chance of players to interact.
If we're really going to structure fast travel (because fast player travel can also be sufficient), the stargate player building system may be the most balanced solution.
1) you must reach your destination at least 1 time using the conventional route (to build destination gate)
2) you must protect yourself stargate
3) The pirate can intercept you because your trajectory is perfectly known
so yes, it will (and it should) require a large organization to build, defend, secure this, maybe we will see a cooperation to have Stargate free, who knows, but you can also have the blockade, travel to old to avoid the blockade, Smuggler etc ...
conculsion :
there is no perfect solution, it may be necessary to do tests and see how the community behaves, not all players have the same expectations, it will be necessary to compromise, nor too simple, to keep the community which appreciates the simulations side of the games (and who are also the ones who will pay a fee several months / years), nor too hard not to scare away the more casual players, looking for a more arcade game play, who may only stay on a game a few months before moving on, but are also necessary to the game community