I don't know if other people have this problem too, but I find it much harder to translate a Chinese word in pinyin than one written as characters. This also makes listening comprehension more difficult.
I am wondering if there might be something planned in Skritter to practice that. Either the program gives you the pinyin or as actual listening comprehension where you only hear the recording (maybe with the option of showing the pinyin which would suggest a 'so-so' grade).