I found your response quite interesting as you expanded on some really important ideas, that I did not. To be honest I hadnt really considered why I-ching had used such a sparse style to describe the travels of the Chinese monks and merely noted that he did. The idea that he conveyed information about Buddhism through his style and his differing descriptions of varying events, both of the travels of the monks, which he described quite briefly, and the monastic life of the monks,which he described in greater detail, was very interesting. In addition,the political relevence you found in the text in relation to the invitation of the various kings to the monks to study Buddhism in their countries, was also a thoughtful inclusion.
In response to your idea that the sparse/concise description of the travels of the monks could rerfer to the concept of the emptiness of the material world which is so important to Buddhism, i think it is possible to read such a meaning into the style which I-ching employs, however I don't feel that such a meaning was intended. Regardless, it is an interesting hypothesis.