The last masochist(or Herakles, I should say) who did all the region ID changes post-shuffle was Gigantus, who explicitly stated he won't ever do that again

. There are supposedly more border changes to come in the future, but I can personally say that I both can't, and won't be the one who changes all those region IDs. And may Skod have mercy on the soul of whoever does end up doing the Region ID revision post-border change.
So SettlementName entries in the EDA/EDCT will have to be changed as well, then? If so: Wew lad.