I get sooooo many emails all day every day. I know you do too! Each one from marketers is filled with lots of images, links and lots of confusion. Simplicity is the key. A confused mind, and thus a confused buyer does not buy or take action.
As the world changes due to covid, consider what you’re focusing on with your marketing. Businesses are going out of business every day. Those that survive have an opportunity to seize market share. ROI matters, but getting hung up on it can mean you lose out on market share which is long term.