I'd play GPB, and probably hold onto IIF, hoping to crash it into some 2 or 3 cost world quickly to get the prestige lead/fodder for GPB.
I played GPB, and kept Alien Burial Site.
Gal Dev + bankers or public works is basically GG if you don't have a dev bonus to fight against it. Honestly Gal Dev + dev rebate is so good it's dumb. Worst part of 2PA.
Heheh yeah. Thanks to the promo homeworlds you can get clobbered by this in any format now. :P Hadn't thought about it until it happened to me outside RvI/BoW for the first time yesterday, in TGS.