It works against weapon based damage and not force/tech...honestly the miss information on these forums is astonishing.
Why doesn't bioware come up with a solution where tanks could have a chance to counter and push back force/tech damage then? such as Force Deflection
or Force Absorb
? Which could be useful for Jedi Shadow tanks. Even by using a superconducting loop as Mace Windu demonstrated with his lightsaber against Palpatine's force lightning could be quite handy for Jedi Knights.
It would be nice to see something like these to be used accordingly in pvp once we hear more about our new abilities with the new level cap once the expansion comes out, because we definitely need something.