How else can you drive a conflict based expansion feature?Indeed - if it's fun then players will engage with it. If being targeted by the NPCs of the other eleven powers all the time isn't fun then they won't. We'll see in time whether player interest meets Frontier's expectations for the level of development time that they have invested in Powerplay 2.0.
We already know that strongholds are no go areas for rivals (unless looking for trouble) and that if you don't want to fight you avoid contested systems.
Seems decent zoning.