Bigger, stronger terrain brushes

When making massive edits, the brush sizes make terrain editing 𝘷𝘦𝘳𝘺 slow. The option for much, much larger brushes should be there, as well as an option for intencity (similar to what we get with the object brush). The leveling brushes would further be much improved by having the option to instantly flatten to the chosen height. The provided image shows my attempt at flattening half the map.