The separation in multiple steps when sending a campaign is OK, but I think the "design email" and "details" steps need to be switched. When you start a campaign, you give it a name. In my case it's often the same as the subject line and I copy it from a blog post. The current workflow requires me to type or copy-n-paste it a second time. If you switch the order, you could simply paste the text a second time and be done. Seems minor, but it becomes annoying when you send a lot of emails.