I am neither for or against the mines on kingdom islands, for it doesn't concern me.
*I just got an idea, since the idea of rivers and bridges came into play. How about a nice troll under the bridge.
Just a funny thought. Someone said something abouts trees being planted around forest. If these trees are stable and not able to be cut down, then the island could use a few of them around to add character in the lands and fit the theme of the island. For example, in Zelda: Link's Awakening [Lost Woods]. Have clusters of trees in pairs leading into pathways, which may not need roads, but grasslands instead (grass = the road another words). I am just throwing things in the air. Since my time to converse with you all is limited, I thought why not help out by lending ideas to you folks. Although I think someone said this, not sure.