OK, here's my latest update for this...
1) Finished the aqueduct
2) Tweaked the breakers and the land contours a bit to tone them down
3) Added a bunch of storehouses, piers, bridges, houses
4) Added "Lord's Keep" - Not sure if I'm completely happy with it.
5) Added temple
6) Added major 'roads'
7) Some other minor tweaks/adjustments to various items.