The staircase rooms were fine looking similar, as they had numbers to distinguish them, but I feel like the actual floors themselves need more variety, as they all use the same floor, walls, tables, etc. Maybe some floors being carpetted or having wood flooring instead of the tile would help, as well as having more debris and objects in the environment like water coolers or different desk variations. I also think there should be a way to regain sanity, as (as far as I was aware), you only lose it and if you don't know where youre going its very easy to waste sanity looking around empty areas