Tigerwoman,
I agree, change is inevitable. However, change must be beneficial to everyone and must be by people qualified to institute change, otherwise you would have chaos as people would do whatever they wanted.
Some change is good. For example, Tae Kwon Do technique changed years ago to longer kicking style, more pivoting, and less choppy motions. These changes were designed to allow more effective technique that was less hard on the joints. The fighters who adapted to these changes were much harder to beat. It was demonstrated that these changes were beneficial.
Example two: In my class, I have adapted new warmup/stretching regimens that minimize ballistic stretching and encourage more static, yoga-based stretching. the result is students who gain more flexibility without the risk for muscle tears.
However, not all change is good. Adapting colored uniforms to make class more exciting is, to me, trivial. How are colored uniforms going to help? Refusing to bow to the flag of the nation that originated Tae Kwon Do is a serious breach of protocol and etiquette. Stetching, some basics, and forms may vary from class to class, but protocol should be standard no matter where you go. I attended TKD class in Spain. I don't practice Taegeuk forms, and basics were a little different, but the bowing protocol didn't change.
If your religion can't tolerate bowing to flags containing um/yang symbols, which are not religious BTW, it doesn't say much for your religion.