Awkward sunken living room - would you raise it? How?

Just bought a house with 8 different kinds of flooring and planning to redo it soon with matching floors throughout. Living room semi- open to dining room but drops about 4-5 inches, including in what is kind of a hallway to the back door. The baseboard is just taller in this area and it just seems weird to me? I’m really not a fan of this and would like fill it in. Husband says it’s “cozy” but I think it’s just awkward with the layout. (The is a bedroom addition on the back of the house off the living room)