So I got a new idea on how to represent Castro's Cuba:
Unique Ability: ¡Viva la Revolución!
+5% Great Person
points for every City State you've pledged to Protect. +10 Influence
with every City State at war with a civ you've denounced.
Unique Building: Dance Hall
+1 Culture
. Unlike the Opera House that it replaces, when the Great Work of Music slot is filled in a Dance Hall - the city gains +1 :c5happiness: Happiness and
Military production is increased by 10%. After an Ideology is adopted, the Dance Hall will provide a +10% Bonus to Great Musicians.
Unique Unit: Guerrillero
Replacing the GWI, the Guerrillero Ignores Terrain Cost and May move after attacking. Gifted Guerrilleros gain the "Guevarist" promotion, allowing them to make nearby units earn experience faster.
So I was thinking on how to avoid the ugly anarchy or resistance feature, which would probably disuade people of using this civ. I started thinking on what characterized Castro's government and once again I came to the conclusion that, as underplayer a factor as it may be, one of the important points of it was the help it provided to Guerrilla groups all throughout Latin America (and Africa). The Cuban army was disproportionally large to the population of the country and it's means of production, and basically every wannabe guerrilla had to go to train in Cuba to hope for any kind of success, and after seeing this country as the protector against "imperialism", I finally got a flash of inspiration. This should be a City State focused civ!
So the UA is inspired by all the, direct or indirect, armed interventions that Cuba had in the various Latin American and African countries, them swearing to protect those countries from the attacks of imperialism, so to say. The denounciation should feel right at place too, I doubt anyone would disagree with me on that, and it goes well with the other part of the UA while making Cuba a warmongery civ in the process.
I made some slight adjustments to the Dance Hall, mostly because I don't like buildings that do nothing on their own, but also because only producing points for Great Musicians fits better.
The Guerrillero was more heavily modified, mostly because the new ability felt thematic and I wondered if it was possible to make an ability that depended on an unit being gifted, as making units just give more Influence when gifted feels lame by now. Another bonus is that, if a City State happens to produce Guerrilleros for some reason, you may end up with a particularly nice unit amongst your ranks!
So this is it, I hope it's a decent alternative at least.