If they're going to keep the favor system -- and it's quite clear they are, doing otherwise would require swallowing a bit of their overly prodigious pride -- why not lobby to at least make it bi-directional? The best suggestion I've seen is to make it so every time someone kills the Lich, Shiro, or Abbadon, someone in halls from another region randomly dies. Alternatively, though far less entertaining, every time someone kills a big-bad someone in halls from their own region randomly gets a 2% moral boost. I'm sure there are other ideas people could come up with, or even a set of effects that are randomly chosen. I'm sure PvPers would welcome the change, after all 'Adapt' seems to be their favorite word, and for PvEers it would add some entertaining possibilities.
Of course make sure that whatever happens is flashed across the screen of everyone in the game. I don't know about you, but "Rolly Polly's team has killed Shiro, as a consequence Jade Doe in The Hall of Heroes has died a horrible freakin' death." would be a lot more entertaining than "SomeGroupYou'veNeverHeardOf [AndDon'tCare About] has won the 20 trillionth game in the hall of heroes today and, shock of shocks, keeps the favor of the gods for Europe for now and forevermore.".
M

, or you can have some nice friends
Because most of us are selfish jerks