"The process of cloning would be so difficult, yet you could still lose control?"
Lin's words were definitely troubling, but the first problem she mentioned actually wouldn't be hard to solve.
When he was on Death Hunter Island, Feng Luo had spent time conducting a full-scale dissection of a T-750 in order to understand the machine's structural weaknesses.
Due to his largely enhanced memory, he had essentially memorized the T-750's structure. Although he hadn't performed the most thorough examination possible, it would still greatly shorten the process of cloning the body!
Furthermore, the technology in War was advanced, so they would not have to build a complete clone in order to perform experiments. Most of the experimentation could be completed on a supercomputer or terminal, keeping the cost down as well!