I love this game so much already and I can't wait to see all of the new content being added. I just have some suggestions...
A more in depth fishing system, someway to utilize the vast amount of water. Perhaps instead of purchasing new lands, one can opt to purchase a fish farm or something that is more ideal and inexpensive to get fish. Can include several types of fish that sell at higher prices and earn things.
I am not terribly far into the game but also more land farming with cows and chickens would be nice. Again could purchase farm plots instead of land or even have some exclusive, rare lands that let you farm or fish.