For some reason in the email builder you can adjust email width, but when creating an email inside of an automation, we don't have the same email builder options. Emails are full width and when sent look awful as they go across the entire screen length. Seems like an easy fix to make emails more attractive to read.
I know you can create email templates and then put them into automations, but this is a step heavy way of creating emails and I much rather just create them inside of the automation builder where 99% of things are done anyways.