You will find that many people take multiple arts to round out thier skills. TKD produces great kicks , however lacks the upclose fighting/grappling a OKINAWIAN or JUJITSU stylist will have. The KATA breakdown is often where this is learned several styles will have the same KATA, yet have completly differant techniques for the movements. What will look like a down strike, one style will use as a wristlock , while another will use it as a throw/takedown. I think you will enjoy the change in the appraoch to the fight KENPO will give you.