I don't think there's any harm in asking. If there's a room available, ask them if they could point it out on a map. You aren't giving up your room by asking, and if there's a room available that you aren't comfortable walking to alone at night (which I fully understand. I wouldn't want to do it either) you aren't obligated to take it.
The room you have sounds great, though, and if you don't want to ask about the refurbished rooms, I think you will be happy in your assigned room. That's our favorite place (70s in our favorite followed by 60s). We ask for it mostly every time. It's peaceful, a short walk, and I find it well lit at night. I've walked from the bus stop to the 70s building at night pushing my daughter in a stroller and felt safe (whereas I'm not sure I would have felt as safe walking through a parking lot). You can ask them and decide then. And if you decide to keep your current room, I don't think you'll be unhappy with it at all!