Many years ago I made a very similar winter coat using MacPhee Workshop Pattern 207 - -World's Easiest Parka pattern. I also made this coat for my daughter. Unfortunately my coat was lost in shipping it back and forth for one of my books.
Not having a lot of time I bought a few new coats to replace it but was never happy with the purchased coats. The purchased coats would rub my face or feel like they were choking me or be to "puffy" for my liking.
It took a while but I finally made the time to make my own coat and have the coat I missed back. I love comfort!
The pattern for this coat, MacPhee Workshop Pattern 207 - -World's Easiest Parka, uses two pattern pieces. I chose to quilt my own fabric and line the coat. I also altered the length of the coat to the length I wanted it to be.
I chose a thin batting that required only required stitching every ten inches so I could use the "quilting" as a design detail. I traced out line that were at a sixty degree angle from the center front and back. I then laid out how the lines would need to be placed on the arms to line up with the rest of the jacket.