Is it really easy to follow? The logic, steps in the argument, exactly
what it is that is being recommended.

A good test. If you can’t easily summarise the pitch clearly in three
minutes, without visual aids, then the chances are you do not have
a workable structure.

Common error: Assuming intense interest and alertness from
audience! They probably dislike sitting through presentations (don’t
you?); may be distracted, fatigued; and have differing views – within
their group – of the brief. And the bigger the audience, the more
these apply. Keep it (even) simpler.