- True. And if you're in "multi-edit" (i.e., you're editing many card at once in a formatted card), then you're hosed (though we've ticketed fix autosave in multi-edit). But if you're editing a single card, you're in luck! We do have a working auto save feature. Let me know if that explanation is not sufficient.
(Furthermore, we do plan to warn in leaving edit mode if unsaved changes).
- True, we have no preview option. It has some complexities (e.g. the afore-mentioned multi-edit), but i think it's a good idea, so, add a preview option.