Just this morning, CCP released the latest development blog for Nullsec Sovereignty, if you have not taken a look yet, please head over there and take a look.
There are many aspects of this proposed change which is scheduled for June 2015 which are very appealing, but the one which jumps out immediately are the defensive bonuses applied for actual use of your system.
The current model of indices are tied to Military (killing red crosses) and Industrial (mining). All of player controlled sovereignty uses this model and the higher the level of indices the more red crosses and ore sites will appear in system for you to take advantage of. With the new model, all of this is still accurate from the PVE side of the equation, but the defensive bonuses of system are tied directly to these same indices as well.
So, to actually gain defensive bonuses above the standard times required for attacker you will actually have to make use of your system.
Where this really helps in sov warfare is that there are huge areas of null sec where systems are not in use at all. No shooting of red crosses, no mining, literally nothing outside of jumps in and out of system. So, all of these systems immediately become ripe targets for invasion. This also makes it much easier for smaller alliances to take footholds into null sec and take advantage of that game play if they have ever considered it previously.
This initial blog and the potential it provides is spectacular.
Already the thread of tears is at an all time high for even the first few pages, and the twitter posts are quite fun as well.
I for one am very excited about the potential for these changes and hope that the spectacular success of Phoebe is brought forward into these changes as well.