While I agree that SWTOR PvP leaves a lot to be desired, this statement is simply false (unless DAoC changed massively in later years).
You could capture keeps, yes, but not build them, nor destroy them (unless you count doors opening as "destroyed"). Shops and so on were introduced in player housing, but that existed solely in PvE areas near capitols. Nor could you build walls.
Sounds more like AoC/Darkfall from the building keeps and walls business.