I would love to see in no set order:

something along the line of mold 164,
the ruined tower,
a hidden door,
cutstone / fieldstone corners to give a nice clean solid foundation to a fieldstone tower,
an octagon tower.

All in all I really like the idea of an extended fieldstone set.

Democracy is two wolves and a rabbit voting on what is for lunch.

Liberty is a well armed rabbit contesting the vote!