Panic Button and cross Kingdom search
Don't know if this has been suggested before, if so I can't find it lol so here goes.
How about a "Panic" button? Say you have 18 yielders out, and see an enemy port in, you could hit one button to bring everyone in at once. Sometimes no matter how fast you are you will lose at least one if not more tiles to that enemy. A panic type button to let you bring everyone home at the same time would help quite a bit.
Cross Kingdom search. I've resided in two Kingdoms (so far) and have friends in both. Also have friends who have moved to other Kingdoms. Twice now I've inadvertently erased all my messages. With the way people move around both in Kingdom and between Kingdoms it's hard to recover their actual locations to write to them. Don't know how hard that would be to code in but it would be a nice touch.
Of the two suggestions the panic button would be most welcome. Great game you have here btw.