I like your suggestion, this is what comes to my mind:
For different kind of messages there should be some images to cycle through, like black burned wizards with that hats fallen of, while surrounding some tipped-over cauldron.

Perhaps even some more race-dependent images as well. And most important, something fun to add to your successful ops or attacks. Allowing for an even greater sense of satisfaction.

But apart from thinking up an idea, it takes people to draw those images and that is something that I cannot help with. My choice to strip down the theme comes from my own preferences to have faster navigating through the Utopia pages, while I am on a limited connection mobile phone.