Currently if you want to "activate" or "deactivate" any one message in a campaign you must open the specific email (i.e. #1, #2 of the cart abandon sequence for instance) within that campaign, then toggle on/off the "Send" button, then click "save", then click "back to campaign". That's 4 clicks just to turn one message on or off. Just put the "Send" toggle under the "Edit" button for each message in the campaign on the campaign dashboard view. Then you can quickly toggle on/off any one message in any campaign. Don't make it so you have to "save". This is helpful when having a sale and don't want to send certain messages offering a discount code, etc. during the sale. When designing any function a primary consideration should be to require as few clicks as possible to complete the task. Turning a message on/off should be a one-click task.