if YOU could choose what renesmee's special ability was wat would you choose

That is such a hard question. But i would still keep Renesmee the same because its apart of her and i can't see her with a different power.
So for your question i wouldn't change it

umm,i think i'd leave it the same

nothing

Yeah, I would keep her power as it is. I just think what she can do is so cool, and It's the opposite of what Edward does, so it's perfect.

I Wuldnt Change! Itz Perfect For Her

Same

To heal

I think when renesmee get older her gift gets more stronger like when she touch's someone they feel weak, drained and collapsed

I like her current abilities, and how they're reflections of her parents' abilities. Maybe in future I'd see her developing her shield penetration ability a bit, since all we really know of that in canon is that she can get into Bella's mind.