[When creating a shape, it would be useful to be able to input numerical values on the fly after clicking on it.]

This is a very very helpful and easy to implement feature request. A simple keyboard shortcut to focus the keyboard on the x/y/width/height fields would already be so extremely useful
 

Would indeed be also great to have the option to input dimensions ‘on the go’, a bit like how sketchup works. E.g. drag an arbitrary sized square on screen type in 50, 50 hit enter and without even moving the mouse to the transform panel the correct size has been given to the rectangle 

[Scripting]

+1 for scripting, I’ll learn any language

[Align to key object shortcut]

It would be very helpful to have shortcuts for aligning to last selected object at least. That would make Affinity Designer a better piece of software

[Feature Request: Keyboard shortcuts for transform options]

This is a very very helpful and easy to implement feature request. Would be also great to have the option to input dimensions ‘on the go’, a bit like how sketchup works. E.g. drag an arbitrary sized square on screen type in 50, 50 hit enter and without even moving the mouse to the transform panel the correct size has been given to the rectangle