I recently stumbled across a box of 1st Edition Dominion in a gaming shop, and bought it with delight, because I'm:
a) a completist
b) an idiot
so I'd love to have the chance to play with the legacy cards for both those reasons... I appreciate that would and should be waaaay down the priority list, but it would be great bonus for a Gold subscriber and if there's a worry about diluting the utility of the 2nd gen cards perhaps legacy cards could be only be added to kingdoms via an option checkbox?