Hard to believe this request isn’t even being considered. PLEASE implement testing. It’s critical to be able to easily test emails before adding to automation, and the workaround of sending each template to yourself is way too clunky, especially if trying to train and require members to perform basic email testing.
Additionally, and probably a separate idea, but Templates in general are difficult to even locate anywhere outside the sequence. If you are searching for a set of templates that you need to test for a sequence, there is not a way to sort templates by Folder or by those used in specific sequences. So unless you rigourously require your team to use naming conventions when creating templates, they just get lost in a sea of templates. Please consider adding and enhancing these very basic template features.