We are in the same point, I mean, now we should change internal names for some faction and create new cultures in RTRA III.
hmmm about iberian. I think that I can help...
Iberian property was people who lived in mediterranean costline from Gades to Emproion. Almost the entire andalusian region was iberian people homeland and currently provinces of Valencia and Cataluña. These peoples were the most ancient people of iberian peninsula and they was the most involved too. Iberian peoples had a huge influence of phoenicians and greek because they had trading by hundred years between them.
The problem is, what tribe do you want to create to RTR? Because, the entire peninsula hadn´t a common culture like gaul peoples. In spain there are three kind of ethnic groups. Iberian property, Celtiberian and Celtic peoples.
Celtiberian and Celtic peoples in Iberian peninsula are difficult to explain because they aren´t celtc property for a few and very importants reasons. The first is that they belong to ancient migrations before hallsthatt, so, they are indoeuropean peoples and slightly similar to gaulish but they aren´t...
So, Celtic peoples of iberian peninsula like Lusitanians or Galacians, asturian, etc are indoeuropean peoples that they arrived before hallsthat cultures and other european celtic cultures. The group know like celtiberian have the same problem but this, in addition its influenced by iberian culture.
And iberian culture is a original culture from iberian peninsula but its the most influenciated by phoenicians and greeks.
Obviously, gaul peoples were influences by greeks in ancient times (greek pottery in gaul, etc), but iberian peoples were totally modified by them...
Exampkles of iberian, celtiberian and celtic peoples in spain:
Iberian: turdetani, bastetani, edetani, south-carpetani, etc
celtiberian: celtiberi, carpetani-north, vaccei, arevaci, etc
Celtic: lusitani, galacians, asturians, etc
Vasci??? The origing of vascii tribe ist unknow and strongly disscuss...
in my opinion was people proto-iberian. the reason is that there are iberian culture places in aquitania region, but these places were isolated from phoenician and greek influence (costline). For this, Vascii peoples and other ancient iberian tribes from atlantic costline were isolated and ceturies later, seem different from iberian peoples from mediterranean costline.
So, celtic and celtiberian can use barbarian culture but iberian its a problem because carthaginian culture is wrong, greek culture is wrong and barbarian is wrong. Iberian should be:
Postraits: Mix beetween barbarian and greek portraits.
Houses: Like carthaginian tipology but white colour and with greek/barbarian cityplan
Temples and art: totally new but with greek influence
for now, its all.