Unfortunately that study is flawed. If I remember rightly, the rabbit fed to the cats was minced up i.e. the whole rabbit including stomach and intestines, cats in the wild would not always eat the stomach and intestines.

The rabbits they were fed were also commercial meat rabbits that had been fed pellets containing grain, soy, alfalfa etc, so the minced up rabbit was laden with grain - something a cat would again, not normally eat. These commercial meat rabbits are kept in tiny cages, therefore they lack any appreciable muscle tone - the more a muscle is used, the higher the taurine content. The process of mincing up the rabbit causes further taurine depletion.

Therefore the cats being fed the rabbit were not getting a balanced diet anyway. Feeding a correct, balanced raw diet does not cause those problems.