Is the floor concrete on grade? ... Or elevated? Is there a seating area needed at the lower level? How you use the space depends on your needs. What possibilities can you imagine? If it were a lounge area, it seems like what is needed most is a small tree. Maybe some large color planters, too.

Thanks! I believe it is concrete. Ideally would like seating on lower level. We are open to moving the stairs/upper level. The wood needs to be replaced as well.

I know it's concrete. I'm asking if it's on grade or elevated.

A seating area is what seems to make the most sense right off the bat. It lacks places to plant. If it's on grade, you could sawcut out plating openings. If it's elevated, you'll need to add large containers for planting large material. But not so large they surpass the weight limit.