So I started with a simple concept and draw a few paths, the main idea of bombsite and background theme. Then I started drawing all paths with contact points (X symbol for each point). Soon I will start working inside of hammer editor and try to realize my sketches! 
Concept idea:
a small town with the harbor at the bottom and research station at the top. I'm thinking about a large hurricane in the background, maybe it is a good idea for the name? "de_Hurricane"
Map project:
I want to keep this map easy to read for a fresh player but also put a few skill jumps and boost spots for more advanced players
