The complaints in this thread that were concerning to me were the ones about formerly-well-insulated eastern realms being ripped apart by monsters spawning just off their borders, and the danger that a small cluster of rogue regions in an otherwise civilized area could become a quickly-expanding cancer that destroys realms without sufficient warning for them to shift priorities.
Border realms on Dwilight need to expect to be attacked by monsters, pretty much all the time. I've got some code in the works that could help to make it so that the threat is spread out a bit more (allow monsters to cross water, so when they pick a target that happens to be in an inner eastern realm, they will hit that realm on its western border, rather than just all piling through D'Hara, Madina, and Yggdramir), but broadly, there's no intention on the part of the devs to make things easy on the frontier realms.
That said, all realms should find the monsters somewhat less problematic with the new changes, as no full-strength monsters will now be spawning within or immediately adjacent to realms, and frontier realms should find their rear borders much quieter (unless the human realms of the east decide that they'd be better off without you).