MailStyler is an email editor which you can install on your desktop. It is “Blocks”-based. You can select from their pre-defined blocks and change the palettes and styles. You can delete the controls/elements (button, text, image) from a particular block, BUT you CANNOT ADD new control/element to a block. What if you want a layout that is not in their list of blocks? I cannot even achieve a layout that looks like the one below. Notice the two buttons at the bottom.
MailStyler might be easy to use but it has limitations. (It does not even have drag-and-drop features of blocks.) If you want a quick a newsletter or HTML email with simple layouts but without having so much layout customizations, you can use MailStyler. Otherwise, you can use the SendGrid’s built-in Email Template creator. (Because SendGrid is currently what we have.)
I have created a sample email using MailStyler. Notice how I was able to achieve adding the button – it is just a single image from a one-column image block.
As for standardizing all email templates, that is a good practice. The question is what would be the standard layouts of those templates. Because that would determine if we should use MailStyler, use SendGrid built-in Email Template creator or any other app. If we opt to use MailStyler, we would just limit the email designer.