One special feature that would change the way of scattering objects...
A spinner to select the degree of the distribution objects normals to scatter on.
Imagine you have a rangy landscape and would like to scatter trees only at slope, you could set a range of degrees and you are set.
Maybe call it distribution by normal angle of source object.
Enhanced with a slider to select the range in height in which the scatter will occur this would be one thing the competition has not.
Just an idea :)