Hey!
Let’s say I make 100 icons. I often need to change sizes and positions. My monitor is wide: the sidebar is far from the icons, and it is inconvenient to aim. Resizing with the mouse is not convenient for small values (e.g., 148px → 146px).
Therefore, I suggest adding the ability to change sizes next to a layer: select the layer → click on the size → enter a new one.
Exactly the same feature would be useful for moving layers and points on vectors to exact coordinates (e.g., 131.48px). I suggest adding that one with the option to turn it off.