Ability to "Place Into" for images (Media Placeholder)
Ability to drag and drop an image into another image to simply replace the image with the same dimensions and size. (feature available in Keynote).
Useful when replacing images/photography that's been tweaked in Photoshop. Otherwise need to import image, resize, and repositioning every time there is an edit.
Patrick Cho shared this idea
I think you can already do that ( v.184.108.40.206). Just drag and drop.