I would like the ability to change the default message to clients... for notifications that the gallery is up, expiration email etc.
On another site I use to use you could customize your default message. This would be a big time saver for me. And I wouldn't have to worry I might be forgetting something. I would like it streamlined so every client is getting the same message and it is automatically there for me to use.
i recently hired a developer to enable the exporting of group details (client name, email, group link) which can then be imported into my email marketing system (Mailchimp, Getresponse etc) for sending custom messages in a mass email for sale and other announcements. Why wait for Zenfolio to offer something that will never be as customizable as 3rd party email marketing software? Sure, it's going to cost me a good chunk up-front, but it's worth it.
Not so sure anymore if I'll offer the solution to others (unless there's enough requests) as it will cost more $$ for that, but it also prompts the client to set up their own password for their gallery, which can be changed later by the user. Also if they decide they don't want their photos online, they can mark their gallery for deletion. It's almost done and it'll be awesome!