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I think this is good, but if people don't want exactly that, how about one simpler option for those who move to areas where their interest in the architecture is toward the architecture of the area. Just a toggle in either Character Creation or at some specific point that lets you give 'generic' or 'current' node exp?
e.g. if I live in a Vek node as an Empyrean and I want to 'respect their culture and not change it', then my efforts just go to 'Vek style' because it is a Vek node already. This way, players who just like 'the current look of an area' or are 'wandering drifters with no direct wish for input' can just have 'no effect'.
This would keep a strong enough incentive for people to play as a race if they wanted the architecture but otherwise didn't care that much (because you need at least some base of that race in the area, probably still quite a few of them) but for those who really want to be a specific race but don't want to interrupt anyone else, they can do this part.
Could even put it as a toggle or something within the Node once it gets to a certain level.
Either way, don't Tulnar already have a setup like this? I don't remember there being any plans for Tulnar Architecture, so Tulnar that live above ground might have this effect already?