When you cut towns, it makes sense for those towns to stay cut until 24 hours, where they surrender.
Right now it's 12 hours. Or is it 6 hours? Not the point - but right now, if you cut towns, players in other TZ won't have an opportunity to uncut the cut. Because the white flags don't last for 24 hours.
This needs to change, so that ALL TZs have an opportunity to uncut the cut, giving them a fair chance to at least try and attack more. Otherwise, the "turtling" mode will always happen, and this is where attacking becomes less frequent in high pops. We don't want that, do we?
So yeah, do change from 12 or 6 hours to 24 hours for white flags.