I've been to NARA 2 in College Park several times. I'm reading this as meaning that only researchers who will request records can enter the building now. The statement seems to be clumsily worded.
It suffices to say that it would be hard to justify closing down NARA 2 for researcher access. Room 2000 is the main reading room and it is one of the largest reading rooms I have ever been in. The building was built for people to come and visit and do research.
NARA 2 is a high security facility as it is. The last time that I visited was in 2019. You are searched one time upon entering the building. You (as a researcher) enter and go down to a large basement locker room where you can place most of your items in a locker. You can take a laptop and a scanner/camera to the first floor, get searched another time, then go up an elevator to the Room 2000, get searched again, and then take a seat and request materials (using triplicate forms, the last time I was there). You are searched again upon leaving the reading room.
Based on my experience, it sounds like they are going to remove one of the searches and put it at the entrance rather than at the elevators for the second floor, though I admit this is speculation.
The more difficult aspect would be having no parking access at the facility itself and having to take a bus there. I've taken the Metrobus to NARA 2 before and it was quite complicated the last time I went there, and I generally like public transportation. Every time I visited after that, I drove and parked in the garage, usually on the roof. That said, I can learn to manage the bus.