Love the ideas but a bit worried about the historical direction of the game here... The blog mentions about how the Battanian faction architecture was difficult as it is based on British tribes whose architecture transformed as Britain was subject to 'waves of invaders'.
I thought the game was based circa AD 11th-12th century? Britain was indeed subject to 'waves of invaders' (think Romans: AD 43-400, Anglo-Saxons: circa AD 450, Vikings: AD 793 and Normans: 1066), however the majority of architectural advances taking place during the early middle ages had settled by the time the game is based.
Taleworlds have then instead based Battanian castles on Iron age hillforts? British iron age hillforts (some built more than 2000 years before the game's setting), despite their name, were not castles. Their ramparts were likely not manned and many interpretations of hillforts suggest their use may well have been as livestock enclosures. They did not have the ranged technology to 'command a landscape' like a medieval castle might (sling technology being a revolutionary introduction during the middle IA), and we have scant archaeological evidence for large-scale warfare during this period. Many hillforts were simply unsuited to defensive warfare; many didn't even have water supply for example and, consider the 21ha Welsh hillfort of pen-y-cloddiau, simply did not have the men to even consider adequately manning the ramparts (if you consider medieval siege manuals as a guide).
What really confuses me then is that: we have a game set during the medieval period which, whilst citing the plethora of influences in play in the preceding 'dark ages', disregards the even-earlier Roman period and instead settles on using the even-even-earlier iron age???
I'm not moaning - I am rattling with excitement for this game - just concerned about some of the reasons behind design choices... But I am an ass.