Regarding #5, you can indeed burn the big and little palm leaves in place of wood sticks, unless you meant something else.
#6 would be nice. It’s currently simulated in Escape The Pacific (wet wood not burning well), in case you’re not familiar with that other game.
All of the points you made should be a thing in this game, but I don’t expect the game to develop much further. Would be nice though. And if the devs ever fixed those under-water stripes, that would be awesome! But that’s another topic: