Maybe I'm misunderstanding what you're asking, but I don't really know what the state of any behind the scenes area of the zoo is because I don't really get many (really any) chances to ask where it wouldn't seem like a really random and out of nowhere question (I blame my anxiety for worrying about that). I only know the cheetah area barn/general infrastructure is in terrible shape because whenever I have been able to ask about the renovations its the one thing every person has mentioned. Also In the Smithsonians FY23 budget request the zoo described their justification for funds for the project as this:
"Much of the CCS area has old and failing infrastructure. The site’s failing stormwater and sanitary utilities are negatively impacting animal welfare, with standing water and sanitary water backups. Over time, these conditions have damaged adjacent systems and structures, requiring a full building and site revitalization, including replacement of sidewalks and shelters. The mechanical, electrical, and plumbing systems can no longer be repaired, and their dilapidated condition is causing significant issues with plumbing backups and insufficient heating, cooling, and humidification. In addition, the public and staff areas are deteriorating, causing unsafe working conditions. The animal habitats and housing are also inadequate, causing animal welfare and safety concerns and not allowing for appropriate behaviors and reproduction of the living collection. In many areas, erosion has caused tripping hazards and unsafe working conditions. This work is necessary to keep the facilities code-compliant with the constantly evolving animal care standards required to maintain accreditation by the Association of Zoos and Aquariums (AZA) and by the United States Department of Agriculture (USDA)."
I remember that area needing some work is one of the reasons the bobcats were never placed back in that old exhibit after the escape (but it was good enough for a common peafowl) but yeah I don't really know anything about the state of that area. That path is actually currently blocked off (along with a portion of the path around the lion & tiger exhibits) and there is work being done in that area (my guess is its this,
https://www.ncpc.gov/files/projects...eat_Cats_Exhibit_Project_Synopsis_Apr2022.pdf) so maybe they'll also fix up those exhibits while they're doing whatever it is they're doing.