I respond to most emails directly out of the Opportunity Details - Activity area by clicking on an email in the Activity list within the right sidebar.
#1 - when starting a follow-up email after I've sent a quote, if the client has not responded, my own email address is entered as the "to" address for the new email. In gmail and in other moxie communicator windows, the client's email address populates. But within this area, it does not. So I have to manually change the "to" email to the client's email address. Would love if that autopopulated similar to gmail and other areas of Moxie, because 99% of the time, we would not be trying to email ourselves.
#2 - After viewing the emails from this same mini email window, or sending an email, there is no way to close the window aside from scrolling back to the top of the window, and hitting the back/arrow button. An 'X' or "close" button at the very bottom of the email window would be extremely helpful here, it feels like it's missing.