This has nothing at all to do with Flixel pause. It's a completely separate (and platform independent) implementation. You can message paused actors like normal - the only thing that's paused about the actor is its physics and the call to when updated.
Oh, I have an excellent idea on how to use that! I could use that as a way to select an item, kinda like a menu when the game is paused. That'll save me some room.And this would go great with Swim and Mind Snap...
It's not ditched. You can turn it back on using a block.