Since I've already had to sleeve my cards to make the changes on the sleeve rather than the actual card, the pdf file would satisfy me. Once sleeved, you wouldn't be able to tell any difference from the back side, which is the side that matters. Both options would be nice for those who won't sleeve, though. Personally, I don't like to play with sleeved cards so I might would even order those, myself. But I'd be content with the pdf and definitely think it should be an option.