I think keeping Korean Terminology is very important in terms of tradition, for traveling purposes(those who choose to do a training stint in Korea), for seminars under Korean Masters and GMs, and for the simple fact of...it is what it is, it's Korean Art so I try to do things "the Korean way" as best I can.
And for the matter of "Americanizing things to make them better", it scares me because that's the way that we've been doing things...learning and making our own and doing our own thing without looking back. Rarely has an American influence on something made things better, in fact most Japanese, Korean, and Chinese Masters look at what we've done and how we perform and practice and they shake their heads because we have it all wrong, we've watered it down. It's unfortunate, but I do think the Martial Arts world is at a turning point most Instructors are starting to get it and seek the influence of others from Korea and those who have traveled there and learned. It's not strictly a Tang Soo Do thing, I study Kempo as well and have been very involved with well respected Masters adn GMs from Japan and China who have guided us and tried to help us back on to 'the path' so to speak. It's a beautifully thing once the pieces come together and you see what you are really doing and you get the how, the why, the when, the where, and the what but a lot are often to ignorant, stubborn, or stuck in our ways to be open to such thoughts. Admitingly, I was stubborn at first but now I am dead set on the path and have amazing mentors and peers to aid in the journey.