I think we are suggesting similar solutions.
The key functionality I would like to have regarding email is to save/link emails to a workspace, address an email from within the OpenGoo contact record, save attachments into the OpenGoo (workspace(s)) and add attachments to emails from within OpenGoo.
Of course more sophisticated features beyond that would be nice like emailing groups of people, contacts associated with a workspace, users associated with a workspace, etc. Also incorporating email templates somehow would be nice. These are just some examples but have secondary importance.