Sounds and more effects, and reverse effect

It's a great video editor. I think it could be even better If we had the reverse effect, because it would help us to expand our criativity. It also could have some sounds. It would be great! Another thing is to let us resize and move an image as we want and on the picture-in-picture effect too. Sometimes I want to use the center on the image and put a side by side video and I can't.
Thanks