Whether something is redundant at this stage is irrelevant. It is an interesting point, but has already been discussed to death. Why not un-left or male-ette like Esperanto? I agree, though, that hope isn't perfectly base like want. You make a very good point.So we don't lose track of agreements like these, can we develop an archival system? This could be a 'related articles' page for these words. ".a'o can be expressed as ba'a .au with a similar but not perfectly parallel meaning." might be a good summary.
My first thought is to make a wiktionary-style wiki, but y'all are better with that than I so I shall leave it to the experts.