Welcome to the community! (since I didn't get a chance to welcome you in your intro thread)

You asked for biting constructive criticism so here I am!

Actually, the thing with criticism is it is very much in the eye of the beholder. Eye, get it? See my avatar? Oh never mind...

Anyway, I really don't have much to point out here. I have to search hard and the only thing I come up with are the "water lines" are too heavy. If you drop line weight on them I think they'll be less distracting and still be useful.

Another one, but even less so is the area around the text. On a few labels things got a bit cramped. You could use a little more space around them.

As for the suggestion from thebax2k regarding layering in a digital medium it is a great one. You can still scan in the various hand drawn layers, but then you have an incredible amount of freedom to really control the over all map and its components.