e penalties to the citadel. Such as extended vulnerability window for the citadel, or increased damage applied.

Actually,


Not only will you benefit from banding together to share resources, having people move their activity from the stations in system to your facility will DROP the cost for everyone.

Or...

for the last part

CCP introduces Engineerig Complexes to correct the imbalanced cost/benefit ratio of the POS which currently provides enormous benefit in a single structure for minimal cost relative to that benefit. Players now have choices to make other than which low index system to drop the stick which include the option to use common structures or go it alone with the corresponding risks.

There is nothing about this that forces anyone to congregate into fewer and fewer systems. All the POS owners in a given system could band together and create a single EC to provide higher bonuses, lower taxes, and not change the system index one bit.

If anything, the current system, with its cheap, easily moved, wardec avoiding and strongly beneficial structures has artificially influenced the spread of industry by not providing any real choice or consequence. By adding a wider risk/reward balance, CCP is adding enough variables into the equation to actually realize the intent of the index system.