Ok, MMOFPS: Forget it! no, really!
Even major game studios with a good reputation easily go belly up when doing MMO-anything. Those games are monsters, you will require not only the usual top-notch programming stuff for graphics, pathfinding, AI, lightning, yadda yadda. But also the experimental stuff for movement prediction, lag reduction, balance.
And thats only the technical aspect, there is the fluff aspect too (i.e. interesting story, although that seems to be good, good models and textures, good dialogues...)
Mayber start with a PnP game to tweak the small scale stuff: equipement, a bit of story writing, personal stats. then maybe a small strategy/tactics game on the pc, then work your way up.
For the setting: first: i think its awesome.
I like the messed up gravity part, the wormole stuff however is unrealistic, unless its a wormhole from one fragment of the ship to another, maybe some very rare ones even lead to the fragments that remained in orbit.