the "Don" has a lot of useful styles like "sad", "happy", "angry". It would be lovely to see the same or more styles to be added to the other voices as well.

In addition to more Stock Voices, it would be nice to be able to create Voice Styles to apply to Stock Voices. I would like to use Stock Voices to synthesize poetry and short stories, and applying Voice Styles to Stock Voices would help match the prosody of the synthesized speech to the written text. Thanks!

it would be crazy cool to add special characters to overdub. they could be used to indicate a pause or timing for speaking a word, or ending a sentence on a high or low, ironic, etc. tone. these characters could be escaped / hidden characters or keywords like in markdown.

The current training is a documentary narration. It would be much easier to create voice styles if the training text had diverse segments appropriate for many styles (happy, sad, etc), including various dialogue situations.

Currently, only the owner of an Overdub voice can create a new Style for that voice. It would be helpful to allow people who have had that voice shared with them to create new styles if possible.