Advanced players probably don't need this. But for the rest of us...it would be great if I hover my cursor over a split pile (or click on a designated corner, etc), it brings up the second-half card, along with the ability to see it full-size. Right now, if I see an unknown split pile, I have to apologize to my playing partner, explain the situation, open up a new tab, quickly navigate to Dominion Wiki, do a search by the top card, go there, find the link to the lower card, click on that, and read that second card's text.
This is not fun at all for the other player who is kept waiting and waiting, naturally. It would be so helpful to be able to see that hidden card's text in 5 seconds, instead of 125 seconds.
[If this has been requested before; sorry about the duplication...my quick look at the most recent posts did not show this.]