Overall, I think we done pretty good job, and that you will be satisfied.
1. Fireplace, it is just optional, you can freely remove it, or use safe gas fireplace.
2. Sliding door, I thought it is good to be able to divide 2 areas, one for living and dinning and other for
hallway with 2 seating place.
Personally, I really do like the look and feel of your new living room, and I hope you will too...