Image Timing on Timeline
It would be useful, when altering the size of an image or clip on the timeline, if you could see on the image the length of time. You can see the Transitions length of time, top of Efffects list. But it's mainly guess work for the clips, going on the Timings below the play control buttons.
Sorry, but I really don't like the way you've handled the Zoom and Pan tool. Without KEYS, as in Premier Pro, you can't control the effect as accurately.
Keys would also be more accurate for the Audio Tracks. Allowing you to gradually raise and lower the volume as it fits.