I did visit on offer holder day yes. I’m pretty sure there were not refurbishments, and if there were they didn’t say anything or show us any refurbished rooms. There’s also nothing online about refurbishments whereas for SSA there is, so I doubt GDSA is being refurbished.
I’m ngl the rooms do look a bit old and tired but I’ve watched a few youtube videos by students and they don’t seem too bad when actually decorated. You just have to make it your own I guess