Making your presentation over-complicated is a very easy trap to fall into. Many speakers make the mistake of giving away too much information.
In reality, giving a presentation is an entirely different genre from writing a technical report.
KISS - In its polite form, this stands for K eep I t S hort and S imple.
Most experienced and talented TV presenters stick to making three points in half an hour - this is surely a lesson for anyone planning a presentation.