So..."Render unto Caesar..."Powerplay is fundamentally about consensual player versus player conflict. We think that pretty much all of the systems and rules would benefit from being played out in Open only, as it would dramatically increase the chance of meeting other pledged players and being able to directly affect the outcomes of power struggles.
Since Mode Feature Exclusivity is being justified by Sandro's statement of Player versus Player style in Open, the next best course of action would be then to remove all PvE activity from Open and make it available only to Private Groups and Solo as a result, as well as make Player vs Player activity completely impossible in Private Groups. This would dramatically increase the chances of players who find PvE content more to their taste and participation in these modes as a result would also increase. Since you're establishing a clear separation of such features from modes associated with direct activity, this can be the only eventual logical result.
"For every action, there's an equal and opposite reaction..."
- Newton's Third Law of Physics
PvP <=Mode Feature Exclusivity=> PVE
Open <=Mode Feature Exclusivity=>Private Groups & Solo
I finally see Sandro's logic here, it's a truly brilliant plan. [yesnod]
Damn the torpedoes, full speed ahead!