They just awarded a multi-billion contract to Lockheed to do just that.
This is the 27th flight of Atlantis, it doesn't really matter how old the technology is if it acn safely get a payload up to orbit at reasonable expense.
Now however it does require a new vehcile to lower costs, and improve some performance.
They will likely use an older concept for the newer craft.
BTW: A good friend of ours, Joe Tanner, is the man who will lead the EVA's and assembly of the ISS components. A program like this helps keep the US well ahead of the rest of the world by developing the capabilities of the engineering companies, and developing world class leaders of programs and engineering. When US firms bid international contracts they are immediately given an advantage by showing they have NASA experience. They can be trusted< /sales pitch>
The previous Shuttle mission had some three EVAs of six hours duration and a couple since by the ISS crew. This assembly mission will have a lot of EVA, including extensive use of the Canadian Remote Manipulator Arm which has to be moved to a new anchor point. EVA is still far from a routine activity.