I know one person already made an idea about Make Same but lets take it a step further and have a Make Same Property Window where you can: 1) choose the object you want to Make Same in other states. 2) choose the properties of that object you want to make same in the other states, and 3) choose the states you want those properties to be changed in.

For me this would be great especially with buttons with a label because lets say I change the font family/style, size and position but I want the color to remain the same on the rollover and down states. I wouldnt have to use Make Same in All States and the change the color back or any other property I didnt want effected. A more complex example would be a Checkbox Component that has 8 states that would have to be modified individually if just a few things needed to be changed.