After checking all of the Cardiac powers in the new issue of Mids, the Damage Resistance portion of all the Cardiac powers does not seem to work at all.
Ex. On my TW build that is built exactly the same as my toon from live, I am at 31.6% s/l resistance with the t4 Cardiac Core, while on live I am at 35.0% s/l resistance with t4 Cardiac Core. In addition, when I turn off the Incarnate powers on Mids, my s/l resistance remains at 31.6%.