In my opinion, her Astral Projection would grow to that point where Prue is able to be awake in her real form as well, and her real and astral form can fight and use her powers, so Astral Projection would grow into Cloning.
Her Telekinesis would grow into Advanced Telekinesis (Havokinesis), when she can make explosions by speeding up the molecules, and she can move many objects and beings at once, and she can move them for very long distance, and she can move very heavy objects. And she can product telekinetic waves.
She would possibly able to use Psychokinesis at high level, and Strangulation, Deviation and Agility.
Her limited Levitation would grow into real Levitation, or even Flight.
And I think, if she would have come back in the comics, she would get a new power.
I don't think that telematerialization a new power for her, because she used it only once, and there is a mistake in Telematerialization's page: If this power can teleport things from one place to another, like Telekinetic orbing, without orbs, there shouldn't be a limit. She should teleport any object to her from anywhere, just like Paige do it.