The value of the format features
Main title - this should immediately explain what the proposal is about - it doesn't have to explain everything, but it should show the general area.
Section headings - the point of using headings is to make clear the step-by-step, logical structure of the argument...
Numbering - adds to this sense of a clear sequence of ideas, and...
Numbered sub-sections - ... give even more detail - although such detailed numbering is really only of use in very big complicated documents (consider laws, constitutions, etc)
Bullet points - an alternative to numbering: less structured and more like a list, but work well if the bullet points are each short, sharp and clearly phrased, since they become more easily remembered