Good design is about function, not decoration. The intended function of the supportive media (p2) directs its design and thus construction. Those who are intend (p2) to be a script and handout and document will design it differently from those who intend to add value to their message.
Good design achieves function whether that is in a car, a building or a presentation. The impact of good design is to significantly improves a presentation. Poor design will destroy a presentation. If a presentation has been designed to be a document for reading it will achieve a different outcome than a presentation designed to add meaning to the spoken message. Design achieves function.
Rather than enter a debate on design specifics, it is clear that a MicrosoftBlueWaveTimesNewRoman presentation makes its own statement. A presentation that is the same as everyone else’s describes its value in that way. A font that is childish informs the audience that the message is also childish. An image that is complex and impenetrable similarly informs the audience. The challenge is not to be fashionable or elitest but functional. Design has impact.
Design is an active process, not just copying. Consider the purpose. Consider the audience. Design the supportive media (p2) to achieve this.