Still don't see how making the outside of MoD non-PK would help in this predicament. It isn't like the arrow spammers are going to decide, "oh my goodness. No. They made the outside non-PK, maybe I should go back to Graal City and plant my thumb firmly up my ass. They have ended my arrow spamming days."
Wouldn't they just arrow spam inside down the bottlenecks?