1) ISOTed societies always remained stable societies... the people always go to work, pay taxes, enlist in the army and so on. Never go crazy by this sudden breakup of all the natural laws. Never go religious fundamentalism, and I can hardly think in better fundamentalism propaganda than an ISOT event.
2) ISOTed societies always are politically correct. They have their renegades like William Walker and the professorin Dies the Fire (not really ISOT, but close and ISOT related) but they´re always defeated.
3) Spain is always doomed. Never mind that in the 1580 they ruled half the world, in the 1700s they´re a stagnant society, in the 1800s lose the american colonies and in the 1900 gets beaten by Monaco or Luxemburgo
4) Brazil is never split in 10-12 countries, like the spanish american. And vice versa, the spanish america is always split in Mexico, US of Central America, Great Columbia and Great Argentina... IIRC Drakaverse has "few" spanish american nations, 4 o 5... but never ever we see a single spanish american nation