When I listen to a thesis presentation, I need to get the big picture before I care about the details. Until I have understood the problem statement, for example, I do not care how an algorithm works or how its average-case amortized runtime complexity beats existing solutions. Not even if it is presented with a nifty visualization.
In other words, if the big picture of a presentation—its structure—is messed up, no amout of clever visuals can save it. The first priority is thus to get the presentation structure right.