Thinking on these - Had an idea.
If you were to make/get a "shell holder" that would snap into your press, but just had a little pit for the primer to drop into, and otherwise didn't have a shell holder at all (i.e. a flat top, except for the pit for the primer - so it just pushes the case up into the decap die) it seems to me like using that, with a press on it's side would let you flick the decapped cases out faster and the primers would fall out naturally.
I can probably fake this some how with wood or plastic or something - Hmmm.
I know you can use the "wrong" case holder as I just did so, 38 Spl holder with 44 Rem Mag brass. Worked OK for a couple hundred rounds worth - except that alignment had to be done manually for each case. Doable.
Anyone tried something like that? Might save a few seconds of time, and a little energy
It's definitely quieter than using the Lee "Hammer the primer out" rig I'd been using, so I can deprime at 3am if I feel the need (and am stuck with evil insomnia...)