Ignoring the other points about bounce rate, brand identity, and statistical significance for a second, I think an aspect that's missed a lot is that good desig

Ignoring the other points about bounce rate, brand identity, and statistical significance for a second, I think an aspect that's missed a lot is that good design accomplishes a goal. The hand-drawn ad, by this definition, stands out more than the "well-designed" one just by virtue of being visually distinct. Asking a firm to help you design an ad capaign should involve iteration, testing, and refinement as different ideas are tested on your audience. If you ask a firm to take some words and make them look good you're missing out on most of the design process.