Since other replies are drifting in this direction, I'll reply to my own post with a comment about Heinlein's fictional conlang Speedtalk, to which Ithkuil has been compared. Like a lot of people, it was one of the ideas that got me interested in conlangs. But after a bit of research I concluded that it wasn't a fruitful direction to head in. I ran into some research in which the rate of information transmission of various natural languages was compared. It turns out that in languages that are spoken faster, as measured in phonemes per second, the information carrying content, measured in bits per phoneme, is smaller. The result is that you really don't seem to get a lot of bang for your buck by monkeying around with your language design to try to increase the rate of information transmission. The bottleneck at the high end seems to be in the processing capacity of the brain, not the structure of the language.