Cole opened his eyes to a colorful tapestry, soon enough this would be all he knows., but he was not exactly ready to leave everything he knew behind and fully become the World Breaker. Regardless, there were things that needed taking care of care, and chief amongst them probably has to be letting Peronico Porins run whatever tests he wants to run.
Being a Raen was probably a lot more than what he the first Raen probably knew. Everyday Cole was discovering new things about his body, and all of these new things were probably just a fraction to what he was probably capable of. Since advancement of his stats to the diamond rank and getting himself to the 100th level, has slowed so much. Cole had to seek out other avenues of improving and growing stronger, and the one of the best ways to do that is understanding exactly what his body is capable of.