Additional Family Grip Handle types
When creating a Family, it would be nice to have more ways of adjusting various parameters within the actual model space, rather than having to go to the properties to set those parameters. Something similar in functionality that is available in ACA when creating Dynamic Blocks.
For example, if I have a yes/no parameter tied to turn the visibility of part of a Family on or off, I could create a Visibility Grip in the Family Editor that would allow me to flip this "switch" directly in the model space, once I have a family instance selected.