Sorry it's never going to happen, like in all other EDAs, because it serves no purpose.
What you are saying is you want floating pads to represent a part. How are you going to show that it is a part, or even label it and give it values so it doesn't get mixed up with other floating parts in a circuit.
Like was said, either make the part, use netlists, or even worse is make a floating pad part, which you will have to remake every time you need to change size because created parts can't be made to be adjustable.
Have a nice day 