Aye, we want to stop the major congregating. A spread of say, 3 or 4 players per system with 5- 10 per major system would be ideal I think. Capitals of houses included.
Seriously, disrupt New York. Do something to it. Just make it less of a haven for people.
Right now it has:
1. Huge number of people
2. Unlawfuls of all Outcast and allied kind
3. Lawfuls
4. Tradelane system allowing quick travel
5. Good trade routes
6. A war
7. A special place in everyone's hearts.
Compare that to a Tau system.
Not at all as good by that comparison.
Really, make the system less friendly. Say a Rheinland strike group got in and blew up some tradelanes to disrupt trade or blew up Manhattan's docking ring.
Do something radical, but sensible.