Im explaining my points.
claiming territory, are you sure this a feature that can be main feature, some people wants free buildings , so for that cases you need that dropsite.
in 0 A.D the CC works together with other SB as Governament center ( AoE1) and university.( you have a point here) but this can be changed in future.
your idea bring a build a farmstead and storehousecaround the CC( with actual game design) (my unique worry is this)
why include a farmsteadvwith 4 basic field around ( like EE 1, Cossacks...etc)
The best way is tested.
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by other way why not creating design committe with team members, modders and experience players? If You like idea I will a topic. The best ideas will be tested public in a mod similar to Delenda Est.