I don't think it's any worse than other auxiliary languages (which I think are all doomed to failure if that's really their goal as opposed to just building a community). I don't know if you can really attack the languages for "problems" if it starts being adopted to the point that it evolves like a natural language (as Esperanto has done). Anything "inefficient" or the like about the language will be changed to the point that native speakers find it suitable.