Being able to target other instances to use the action as well as the ability to use actions across scene types (normal and menu) are the biggest enhancements. The secondary ones are being able to use variable values and a few new settings.
Viewing post in Enhanced Actions Pack #1 comments
Does it let you have one object do things to another object?
Like, can i have an object apply an effect onto another object without having to do it within said object?
That's what it sounds like.. which is something i've been wanting to do. I shouldn't have to apply a screen effect to an object within THAT object.. That's almost what it sounds like you're saying it does..