It'd be great to be able to add color (even if limited) or at least burn/dodge areas, especially on the background.

For example, I was just trying this out yesterday and I'm happy with the example I made (attached) but it would look a lot cooler (and open up more possibilities) without the distracting blurry guy in the back. Would love to just toss some black over him, clone stamp, or burn the area dark enough that he's not visible.