PP's are pointless, some pun intended:)
They are used in the CT cheifly to act as limiters in any given set up, wher they are in fact used. Most set up's have no perk planes at all and theirfore perks are pointless since all planes are Zero point's to fly. In other set up's we reset the perks to Zero and use low perk values to try and limit certain plane types use, it is better to reset the perks since this levals the playing field for this type of set up.
Perks should not be viewed in the same light that they are in the MA.