Fair play that PP can always benefit from more missions - but in answer to the OP I think it's good move when seen in light of the recent C&P because it sets up a more permissive PvP battle zone.
This already exists, right?
While there are a lot of people who want to play a PvE game there are also a very significant number who feel PvP (MMO) is their only legitimate way to play .. and this change makes that delineate inside one open mode.
Although I understand the desire of the PVP folks to get more for their money, how does Open PP provide that to them, knowing that nothing else within the game that leads to 'emergent gameplay' is changing?
I think it will make regular BGS trading in open much less of a silly thing to do (because pew-pews will largely be otherwise engaged) and could well nudge more people into open, where you can already have positive experiences just as well as negative ones, even though that may not always be the perception.
Perception is the key word here. FDev is playing to the perception of PVP people that Open PP will somehow magically improve their lot within the game. I see, at best, a marginal improvement to their perception...and little or no real improvement on their gameplay activities. They are going to need to have players grind merits...someone has to fly for them to shoot at. Something else will have to change within this part of the game to lead to this behavior...