The idea that we need to size and position layers with values between zero and one is very user hostile. It requires assumptions and zoom/pan "by eye" which is wholly inconsistent with a designer's vision which can be an actual contract requirement. This can be a huge time waster trying to increment values 0.001 at a time and then throwing it out the window when you zoom to a different value. Other tools like Crop and GT Title actually use pixels as values.

Example: A picture-in-picture window where one input needs to be ##px from the top, ##px from the left, and ####px wide. A second input needs to be ##px from the bottom, ##px from the right, and ###px wide. A logo input needs to be ##px from the bottom, ##px from the left, and ####px wide. This is a very typical PiP layout and use case in many productions.