Shifting or extending the runway does not necessarily provide a safety-related benefit. On the other hand, paved safety overrun areas off each end of the runway , in combination with a declared runway length , solves Jackson Hole's safety concerns. Paved safety overrun areas would be used only for emergency situations, like an aborted take-off, or an overrun of the runway upon landing. They could not be used in calculation of take-off and landing weights. To enforce this, the FAA should declare the usable runway length to be what it is today.
Radar tells the tower where planes are.
The tower can tell the planes where they should, or shouldn't be. The only missing component is a mandatory restriction of airspace over portions of GTNP and the JSWA, to provide the tower the authority to tell the planes where to be. Currently, there are no mandatory restrictions like this. Airport development proponents will say that much of this isn't possible because it's the sole jurisdiction of the FAA, it's not the way FAA does things, or that these changes will take congressional action. Anything is possible, as it should be, when dealing with the future of one of America's crown jewel national parks.