This showcases that prototype process can be this much rough as paper prototype.
I found this type of sketching the flow is extremem helpful and time saving process.
This paper prototype was done when we tried to figure out the very big feature in our application. 
It was so complex that the prototype itself did not even fit in the table to lay out, but I thought it is very important to capture the whole thing to showcase the process as a bigger picture. 
 
Paper prototype is very helpful in 
1. Figuring out the entire flow of the application
2. Building the idea quickly
3. Visualize the idea and context as a flow rather than detail visual design
4. Deciding to prioritize which component to start implementing
5. Collaborating easily with other people in the team.
Paper Prototype
Published:

Paper Prototype

Prototyping a big feature in the application

Published:

Creative Fields