You can still share your castles. Next to the "Share" button there is another button named "save". When you're done with building your castle you click it. There is a button that says "Export". If you click it, you'll receive a code such as this:
{"l":["tt","mt","bt","wc","id"],"r":["rw","rwc","rs","rsc","ri","ric","rb","rbc","rfb","rpb","rrb","rf","rl","rr","ra","rp"],"c":["am,390,429.1,1,1,0","am,749.9,429.1,1,1,0","cv,350,359.1,1,1,0","cv,429.9,359.1,1,1,0","cv,710,359.1,1,1,-0.2","cv,790,359.1,1,1,0.3","twd,389.9,274.1,1,1,0","twd,750,274.1,1,1,0","bss,99.9,399,1,1,0","bss,119.9,399,1,1,0","bss,140,399,1,1,0","bss,160,399,1,1,0","bss,99.9,299.1,1,1,0","bss,120,299.1,1,1,0","bss,140,299.1,1,1,0","bss,160,299.1,1,1,0","an,129.9,229.2,1,1,0","twd,129.9,174.3,1,1,0","mg,30.4,658.4,1,1,-11.9","mg,20.2,658.4,1,1,-11.8","mg,-61.5,-11305.2,1,1,-175.9","mg,0,658.6,1,1,-11.8","mg,10.1,658.4,1,1,-11.9","mg,40.5,658.4,1,1,-12.1","mg,49.8,654.2,1,1,-12.2","mg,67.2,613.6,1,1,5.4","mg,58.1,645.5,1,1,-12.4","mg,194.9,429,1,1,0","mg,225,429.1,1,1,0","mg,270,429.1,1,1,0","mg,299.9,429,1,1,0","mg,499.9,429,1,1,0","mg,459.9,429,1,1,0","mg,554.9,429,1,1,0","mg,659.9,429,1,1,0","mg,605,429.1,1,1,0","mg,830,429.1,1,1,0","mg,914.9,429,1,1,0","mg,970,429,1,1,0","mg,1039.9,429,1,1,0","wizard,389.9,369.1,1,1,0","wizard,744.9,369.1,1,1,0","easant,245,405.1,1,1,0","easant,580,405,1,1,0","easant,940,404.9,1,1,0"],"n":"Trade Route","t":[0,0,0,7,230,230,230,230,230,230,230,230,230,230,230,230,230,0,0,230,230,230,230,230,230,230,230,230,230,230,230,230,230,0,0,230,230,230,230,230,230,230,230,230,230,230,230,230,230,0],"o":1,"":"OperationNilo"}
Kinda long.
There should be a thread to post this castles.