A number of other TTS software companies like Amazon Polly and Natural Readers have some incredible neural voices like the British neural voices "Amy" and "Brian", the American neural voices "Matthew", "Joannah", and "Kendra" (who sounds exactly like the HBO Autopsy series narrator Marlene Sanders). It would be fantastic if Microsoft Azure could add those neural voices.
Also, please consider adding the German standard voice "Hans" which although not neural is virtually indistinguishable from a real human voice.