I went into Google Streetview to get a better look at the Energy Building and found myself on the bridge that carries West Avenue over Shoal Creek. Surveying the buildings that form a "four corners" at that spot (the Energy Building being one of them), I kept hearing that Sesame Street jingle:
"one of these things just doesn't belong here, one of these things just isn't the same..."

tear the f*cker down and build something worthy of contemporary Austin.
Also, not to be one of those posters pining for information when there isn't any...but what happened with Green Water? I always kind of liked that project more so than Seaholm because of the density it would add and extension of the street grid, but it seems to be in hibernation mode. Or dead mode. The market is ripe, just git er done. And maybe give the 2011 iteration another look while you're at it.