Having nothing to do has nothing to do with 'who' are the ones creating the things to do. Adding more cooks doesn't always make the recipe better or allow you to get your food any quicker.
Things we know are coming.
1. Station repair jobs. Vending machine re-stocking.
2. Civilian transport infrastructre, regular scheduled flight routes by NPC 'airlines'. There are also planned holiday travel services which include entertainment and accommodation.
3. Dynamic events, more often and at varying scales - some long duration over multiple episodes some local and short duration.
4. Refuelling/Rearm/Resupply.
5. Salvage/Reclamation.
6. Rescue services - in his last ISC appearance Tony Zurovec mentioned that NPC's attacked by pirates along trade routes would put out distress beacons the players can answer because the NPC AI ship has been destroyed and they are in their escape pods.
7. In-verse competitions such as racing (there are other sports coming too) which will be held on an almost daily basis. Players and NPc's will be able to swim, we have lakes and rivers coming. Kayaking or white water rafting may be a possibility. We have ice planets so that we could have snowboarding, skiing, snowmobiles, ice skating on the frozen lake at New Babbage. If they are going to put pool tables and basketball courts into the game you can be sure there will be events planned around those activities.
8. Wild animal hunting/capturing. Exotic fish trading.
This isn't even a complete list since it doesn't even touch on the scripted/organised local activities. Each location in the verse will have both Empire-wide holidays and events as well as local events, they also have local sporting events specific to that location. Surfing on Tangeroa for example. We know that Orison will have guided tours for 'tourists' conducted by NPC's. The Chairman's Club Handbook for Concierge members talks about the Port Renatus Metropolitan Opera House on Mars and Fashion Week on Terra III. We have the minimum of some game features now simply as proof of concept, for example the in-game shopping experience will be hugely expanded once the server capacity expands.
Don't forget the time sink that having your own home and fleet of ships will be just to manage and maintain them.
CIG are very keen to facilitate player organised events - we have bars in the game, couple this with FOIP/VOIP and you can have quiz night or karaoke night. Everything doesn't have to be about 'quest missions', the game universe will have plenty of entertainment and more places to visit and things to do than most players will be able to manage in a lifetime. Have you heard of the in-game internet service? The Spectrum? It will have regular shows (news and entertainment) and events too.
The problem is that the game is already huge and complex and so takes time to build, making it more complex than already planned won't solve anything and it isn't even necessary to have a system to make player based 'quests' since players will be a small minority in the game universe. The Quantum system will dwarf any players input.
[EDIT] How cool would it be to attend the in-game School Of Xenoliguistics to learn Xi'An, Banu or Tevarin - or even Vanduul. Or to have to attend for a flight/driving exam to get a license for a road vehicle or space ship.