Congratulation VirtuaBoza for your great Mod.
If I may, here are some suggestions of things that could be done in order to improve it. I must admit that I haven't read all the posts of this thread so it's possible someone else already made them.
Those ideas come from the other GoT inspired mod on Civ, called "A Civ of ice and fire", and which developpment seems abandonned but, yet, had some good ideas to make the game more interesting... and more "in tune" with the books.
And the best part is that they are probably too not difficult to include.
1) You could add a technology "Valyrian steel" and a few mines of such steel on the map, which allow to build valarian swords that increase the damages of knights.
2) You could add a technology "Dragonglass", you know the stuff that, at the end of season 3, allow to kill one of the white beasts (don't remember the name) and, of course add 1 or 2 mines of such steel, that would allow to build even more powerfull swords (and arrows). Instead of mines, you could also decide that this ressource can only be received from a specific city-state (Castleblack) as a present, which would make it difficult to get, and so valuable.
3) You could add the "Wildfire" technology. This requires "Pitch" and "Agrumes" (Pitch being, in the other mod, represented by petrol). This "Pitch" should be rare. It alone could be used to create flaming arrows for archers. But, combined with Agrumes, it allow to create Wildfire ballista and Wildfire boats with big damages capacities.
Because of the power of such weapons, the "¨Pitch" ressource should be rare. Or, it could be only given by one or two specific city-state(s) located in the desert, as a present.
4) You could also create the "Faceless man" unit, which is able to move in the ennemy territory without been detected, in order to strike a specific high value target. But it's possible to have them detected if you build a special building in the city.
So, if you think too that would make your mod even better, do not hesitate to implement !