It's so easy to just keep cranking out the same look with each new e-newsletter. Your readers are accustomed to the look but can you tell the difference between one issue and the next? Can your readers?
I recently changed our two column to a single column, trimmed some of the regular (repetitive) features and tried to shorten the number of topics in each issue.
It's great that you are experimenting with different templates & layouts.
A few notes about the email.