The ability to have branding more prominently in galleries as a header rather than a footer would be ideal.

I have my galleries arranged in folders depending on the client type. The settings for each client type are usually the same, which means remembering to set those flags the same for each gallery. (For example, for my headshot clients, identify visitors = true, download = false.) Would it be possible to allow default settings, perhaps based on folder? (It's only a convenience thing, but I'm sure I'll forget to turn "identify visitors" on someday before I send it out!)

The ability to import images directly from a cloud service such as Box or Dropbox, rather than having to use the web uploader for every gallery

Add a watermark to each of your photos

Would it be possible to implement sharing galleries directly from Picflow instead of having to copy a link and the gallery title to an external email program and sending from there?

Being able to share a folder containing multiple galleries.

This plugin will allow to upload directly from Lightroom and sync feedback automatically.

As we become more and more hybrid shooters (photo & video) it would be great if we can add videos to the galleries.

Add custom files to a gallery that a client can download.

I would LOVE to see Capture One compatibility. Where I could directly export from Capture One to PicFlow and my ratings are imported back to Capture One. If you could nail this, you'd have a huge market of the world's top tier photographers. Capture One (over Lightroom) is the industry standard RAW converter.