I like the look of it as it is, with a grid, but would like to see it without for comparison.
I'm not the river police, my beef with the rivers are the color, it doesn't quite tie in with the sea.
I must say the style reminds me a bit about a Games Workshops map.
I second the req for a text/pic tut. I like to go over the steps a few times in my own pace, testing different ways to do them.