I have to chalk this movie up as a Visual Experience. The narrative hasn't really been improved upon since the days of Dancing with Wolves, but the graphics and action are in tune with today's expectations.
The movie is very preachy with regards to its environmental statements and humanitarian themes (substitute carefully crafted kitty aliens which tug at our heart-strings), and the evils of corporate greed vs. the universe.
In regards to the additional footage added for this re-release, I was glad they added about half of it, ambivalent to one added scene, and felt they could have left one scene on the editing room floor.
All in all, this movie begs to be seen in IMAX 3D.