While it was a neat idea (and used exclusively in the Pacific), it really accomplished nothing. The Japanese had little in the way of tactical radio intelligence and less in means to diseminate it where it might be useful. As to giving these guys the CMH, what an insult to those who really deserved that medal. KVOA (One of Tucson's liberal news stations....first hand knowledge there as I don't apply that moniker lightly.) suggests this. As typical ill-informed fools, they overreach. The "code talkers" did their duties just as those beside them did.
If one reads typical CMH citations from WW II the code talkers as a group didn't come close to earning this award. Give them Meritiorious Service Medals if you must (this award is for exceptional service but not valerous acts). Add a combat V to it where appropriate. But please do not disgrace the CMH (which is similar to the Victoria Cross in award requirements) by handing it out just because a tactical radioman could speak a unique language.