Brian, you asked what need does this address? It addresses the need for people to have clearer, more familiar-sounding espeak voices with a choice of speaking styles and inflections or intonations. Since most people like Klatt-based voices, such modifications would give people several different klatt-based espeak voices to choose from. Also it may be helpful for a good-sounding klatt-voice with a familiar speaking style to be set as the espeak default voice, rather than the non-klatt harsher-sounding voices.