DS is a flop. Outside the two 6 mans and the one time you'll do the main quest on each character you really have no reason to be out there.
The repeatable quests are lame, and other than some blue quest pots(which I'm not sure are repeatable), there is really nothing to do out there other than run to the 6 mans and use the gear vendor.
I can see some activity when they release Centriss, but all it's going to be is people forming up for raids, so unless your on Fury where you can pvp them it's the same as people running to a 6 man.
Basically the solo content out there is not worth people coming back by themselves, and groups will go straight to their instances, so your left with a dead zone.