Aloha 2spoooks,
Your Great Room is technically the living room of the house then.
You work with what you have in regards to the space and furniture. There may not be "support" behind the couches/chairs other than their backrest, however, look at it in perspective of them being able to see the flow/entrances into the room. You'll probably find that those couches and chairs are gravitated to more often.
Images of water / moving water can be soothing to the spirit and help cover actual water activations to some degree.
Much Love,
Shawn