Add helper for 45-degree movement using precise move
Precise move is super useful, but there's one feature that I'd like to see. When you move an object in two axes at once, white lines are shown for each axis. It would be really cool if the object would snap to the point where those two lines are equal length, which would make it easier to move objects at perfect 45-degree angles relative to the precise move axes.
You can hold shift (L1) while rotating using precise move to snap to 15 degree increments.
Ah, looks like that's not what you wanted? Sorry found that a bit confusing.
So this would be a fine feature. In the meantime, you can do this by adding an object on-grid, rotating it 45 degrees as reference, then aligning the grid to that object with L1 + triangle. Now you can precise-move things using that grid orientation.