Just some quick thoughts from playing (only up to age 5) of a game so far:
Blue looks a lot like purple (on my monitor, anyways).
When my opponent "draws and scores" a card, I'm shown the name of the card (when all I should get to know is the age).
I'm not sure, but does Tools[1] let me return less than three cards (for no effect)? I'm fairly certain you should only be able to return exactly 3 or exactly no cards to its first effect.
Is there a way to see the text of the special achievements?
Any thoughts on an undo button, at least for "Meld"? I've clicked cards trying to read the tooltip (in no text hand mode). Also, an "are you sure" for cards that won't have an effect when dogmaed, like demands that hit no one?