Is PowerPoint costing you too much time?
Your presentation is aimed at informing and/or convincing an audience. What's in your PowerPoint is just one part of that: a good story, a strong image, and positive interaction with the audience and viewers are much more important. Then it is indigestible that a large part of the preparation time is spent on your PowerPoint? And not even in the content?
PowerPoint is a beautiful brother of Word with many possibilities. But the average user spends too little time with PowerPoint to become really handy at it. And for designer, you as a user have not learned either.