Can someone please help me understand this article on lethal injections in Tennessee?

The new protocol is not giving the person drugs that will knock them out before the lethal drugs begin to kill the body. The inmate could feel physical and mental pain during the dying process because they would be awake and know what was going on and could feel the pain in the body as the drugs were taking effect, so they want to stop the injections until they feel it won't violate the inmates rights by causing him too much pain or anguish. Gas Chambers and Electric chairs cost alot and they don't want to use those so that is why they use injections mostly. Plus it has been considered an easier death since you are asleep and don't know what is happening. Most states have different options for what to use for an execution, and they usually give the inmate a choice.