First of all I LOVE that you guys brought back the superharbour construction options from a previous anno (I loved constructing a custom harbour). HOWEVER...none of the modules from the Docklands main wharf count toward the "Shopping Centre" mission in Trelawney; any module like depots, Harbourmaster's Office and piers need to be constructed in the PREVIOUS way via the 3rd population tier. I doubt this was intended as the NEW harbour construction is much better than the old way but building a new one AND an old one side by side simply to accomplish this "main" mission is superfluous if all you do afterwards is tear down the OLD buildings because the new buildings are more efficient AND at a smaller footprint to boot.
So in effect you build these buildings once and immediately upon completion tear them all down again.