the wikipedia article about lojban might need a short list of criticism of lojban with links (e.g. to posts in this mailing list). Balanced criticism actually makes languages more popular, so it's advisable to make such a list.
Here are some thoughts:
1. gismu are hard to learn by everyone (as the algorithm mutilates the initial form of words)
2. za'a/ga'a/zgana/zga is hard to remember (would be better to have one root instead of 4)
3. abundance of kafkylerfu
4. still no machine translation
ke'u, links needed, the list might need more items