If you could add just one more faction it would be...

[Martok]

to be honest though, you can add 6 faction since there is 30 faction slot.

Uh, since when? I know that CA said they would try to raise the faction limit to 30 (from the current 21), but I have yet to see anything that confirms that they've actually done so. As far as we know, the faction limit is still stuck at 21.

I didn't realise they didn't put Aragonin until I saw it on the list, I can't believe they took it out. No offense but what were they thinking, Aragon was a major player in Medieval Europe and vital in the reconquest. I do hope someone does a mod and puts them in.

It sounds as if the Portuguese were added to give players their traditional 3-way war on the Iberian peninsula (in MTW it was the Almohads, Aragon, and Spanish) in lieu of the Aragonese. While I think I understand why CA did this, I still believe that Aragon would've been much more of a logical choice, as they were one of the two major Catholic powers in northern Spain (Castille-Leon being the other one). Portugal wasn't as significant a kingdom until later on in the medieval period.

Of all the nations that weren't in orginally I would like to have Burgundy, because they were a key English ally and had a quite a bit of potential.

Don't they have the same problem as the Golden Horde & Timurids, however (in that they wouldn't appear at the beginning of the game period)? I thought Burgundy wasn't really a significant power in the European world until the time of the Hundred Years War.