Audio warp/Free warp grid on the actual track instead of a separate window. This will make it easier to compare two tracks side by side. You can already expand them to make them the size you need for visibility.
Example: Layered Guitars and the bass track
I want to match both guitars parts and the bass to the same grid using Free Warp. This would be much faster being able to see the tracks together while warping. Why not have the audio warp grid show up on top of the track with a smaller options/features pop up window similar to the quantize panel that can be moved around.