Ok, not bad, but point 1 effecitvely blocks a lot of players from PP. There are probably more people than you realize who play ED who don't have time to coordiate wing play. I try and play an hour a day or more if possible, and its rare i find time to wing up. Just organizing it can take 15 minutes or more, not to mention possible issues with instancing (although i've not had much trouble with that myself).
Your point about 2 is valid, assuming the wing spots them before they can interdict the trade ship.
Point 3 - well, that's the big question. My suspicion is though, with what you want, you're not going to see more people playing PP in open or any mode. But let's assume you do get a few more in open overall because they want the competition. But with the PvP that is going on, a lot less fortification is going to get done. A hell of a lot less. Especially if you have only 1 person in 4 doing the deliveries (although in theory, you can have 1 doing bulk, and the other 3 with say 8t or 16t of cargo space, if a PvP build can spare that. You're not going to get rank 5 though doing that.
My suspicion is after the first weekly tick, every faction is going to be suffering. No expansions, no preparation, and most systems not fully fortified. There will be a massive CC debt.
This will go on, week on week, until the players can contribute enough to fortify existing systems... and then be stuck, because they are not going to have time to spare to prep and expand.
By this point, i'm even willing to bet that the powers are not even touching each other, not even having contesting systems, although i most definitely could be wrong on that. Without conflicting systems, then you have no PvP anyway.
Ill accept that i might have some things wrong here, but just going off what i understand of PP and my estimate of how many people will PP and how effective they will be.