I generally agree with your advice, but was curious about a few things. Do you feel Taekwondo and T'ai Chi use qi/ch'i/ki in more or less the same way? Do you see any conflicts between the two approaches?
Much of my T'ai Chi study has been in mixed settings, and my original introduction to T'ai Chi was as an explicit "add on" to a karate style. I have found that knowledge of one has indeed helped in learning the other; nevertheless, I have continued to have great difficulty in "integrating" the two approaches at many levels: fighting distances, mental attitude, technique focus, strategy, etc. I would be curious as to what your experience has been.