With the arrival of bulk create in Express and the need of more content from clients, keeping prompts INSIDE the image (and not the (too long) title, would certainly help.
Double this with sorting in Bridge, and we're good.
Generating is a nice thing, not regenerating from scratch everytime is better.
I haven't found the (official) feature request made by dhumann that he proposed in the forum :
It might be cool to implement an option/checkbox in the GUI that allows the user to store the prompt data in EXIF. Both JPG and PNG support this feature and it might come in handy. For example, the prompt info could be easily shared with others via the image file. It could also be retrieved for use in an image-to-image scenario if/when Adobe extends the feature set to allow image prompts (using uploaded images).