Regarding camera moves, I think it should be illustrated, maybe with some field guide information. Same goes for transitions. If you want to add this kind of stuff to your animatic, I would prefer to use a editing program for that. While the storyboard is developing it could be nice to be able to introduce sound snippets at different locations in the timeline, so I think your right on that. But I would prefer the program to be light and focused on print, in the first place. And to be able to export it as a basic animatic for further development elsewhere.
I would like a beta to be really basic, to be able to get going ASAP.