A common complaint of Tau players is the complete and utter lack of psychic power protection. This is not a rant but more of an explanation. The current Tau Codex was written back when psychic powers were a rare thing on the battlefields of the 41st millenium. Few armies used them extensively save for Tyranids, Necrons and Eldar so there was little need to include any wargear or units that had some psychic protection. There certainly weren't any powers that were over the top and certainly none that rivaled the power of having more guns than your opponent. There simply wasn't a need for psychic power defense during the time when Codex: Tau Empire was released.
Nowadays psychic powers seem to be coming to the forefront of 40k with the release of Jaws of the World Wolf, Lash of Submission and who knows whats in store for us when Codex: Tyranids is out. There are now powers that are defensive in nature, some that cause casualties and other they can move your enemy's models around. With such powers now being thrown about left and right these days, psychic protection is getting close to a necessity. I predict that the next Tau codex, whenever it's released (could be many years yet), will have some wargear or unit with psychic power defense, even though Tau don't register in the Warp. It's a simple matter of giving the army a fighting chance against the witchcraft of Space Wolves, Eldar and the Chaos Sorcerers of the 40k Universe.