Your berms in blue along the "north" edge will work just fine to capture all of the surface water that moves across your property. They can probably be fairly low and still serve their purpose. (Maybe a little higher as the berm approaches the pond.)

The berms would also be a good place to spoil the material excavated from your pond. Make sure your contractor stockpiles your topsoil, uses the clay from the lowest portions of the pond to construct the berms, and then finishes the berms with your good topsoil.

Using less than 1:3 slopes for pond safety seems strange when you contemplate walking on dry land. However, it can be quite difficult to walk up a slippery slope in a pond, especially for small children or the elderly.

If you will have either (or livestock) around your pond, then I would have one small portion of the pond have a slope of 1:4 or lower as RAH suggests for safety. The rest at 1:3 should help you minimize shallow plants (unless that is what you want).