I like this format, but I have 3 email address with you (1 private, 1 for subscriptions and 1 for my startup company) it would be great if the I could immediately identify which account I'm using, to avoid send an email from wrong email. As of now the email ID is at the bottom left corner and shows initials but they all have the same color and couldn't find a way to customize them in setup (change color or upload a small picture for example). Also, it might be wiser if you'd have that on the top, closer to "compose" sign so that you can have a glance at it before you click on compose. It could be only me, but I though i send it to you anyway.
Thanks for reading it through! :)