It would be helpful to have a checkbox in the "Export As..." box to disable automatic cropping when a layer is exported. Without this, it's impossible to bulk-export transparent frames from an animation without PS adding juddery movement as it tries to centre and crop (then re-expand the canvas).
In the example below, 50 transparent frames were loaded into PS, then "Export As..." was used to save them again, leading to judder. The smooth version was done by switching layers on and off and saving the image for each one, which is really time consuming.
Adding a tickbox to disable automatic cropping (so PS just leaves the canvas size alone) would make it much easier to modify basic animations like this without firing up After Effects.