The PGA won't go for anything that devalues what they have, my suggestion would be to enhance what they have and enhance the product in Europe.
I wouldn't suggest dropping any events but if it was a truely global tour under one banner then you could effectively have a main event in Europe with an under event in the US (and vice versa) with a qualifying criteria to play in them (as you get now to a lesser extent) and rank them appropriately for FedEx or WR points. Travel is no hardship for these players now and if done properly it would benefit everyone.
as if by magic- Golf channel posted these comments today http://www.golfchannel.com/news/gol...ld-tour-play-more-international-events-102914