I really am not contentious by nature, as you can see from other posts. I usually try to be respectful and open to others as a rule. I am prefacing this because it looks like you already made up your mind. Don't ask the question if you don't want to hear the answer. I think you had two fairly senior people answering your inquiry in good faith, and are not open to hearing something you do not want to consider. Note, my school teachs JKD, Kali, Silat, Escrima, Muay Thai, and we have classe in BJJ and Vale Tudo.
But other than an ocassional seminar to see how the opposition can fight, and to expose ourselves to something new, you see little cross training. Cross training is just really popular right now. You ask why? My personal feeling is that people don't want to put in the years it takes to progress in a system like Kenpo or Kung Fu. Look at the popularity right now of the SPEAR system or Krav Maga. Quick fixes, some good things about them some bad, and they are just examples.
I also studied Taekwondo and Shotokan. But never at the same time. My Japanese style Sensei would never approve of my training in another system simultaineously. The JKD guys have done it for years, Danny Inosanto, Ray Para, and a lot of the Phillipino arts cross train. But now it is in vogue, that is probably why you get initial results from us that you don't like to hear. We have students who have tried to learn multiple arts at the same time. It is nothing personal against you, it is just our opinion.
See what others say, we have people on here who cross train and others who just don't believe in it. Post a poll if you want and see what the majority of votes say ... then run one where you specify the level at which it is ok to start cross training. I feel ok about a Brown Belt or Black Belt student cross training. They have a foundation to compare, contrast, and evaluate the effectiveness.
I too have great kicks from Taekwondo, but I know Kenpo guys, like Mark Ainsley who is a serious competitor sparring and has awesome kicks (talent? training? emphasis by a teacher who was previously in a kicking art? who knows?) But Kenpo is one of the most complete systems around. Give it a chance then go where you will. I don't want to sour you on Kenpo by disagreeing with you, but you did ask the question, so you are getting an opinion that some other instructors share.
Each of us must make their own Jouney, who knows where yours will lead you.
Oss,
-Michael
Kenpo-Texas.com