It'd be nice if the attack command had the text of attacks instead of just an asterisk, it only tells you if they do damage and you have to get out of the attack menu and read the card so you know what the special effects are.
If you hover the mouse over the attack for a couple seconds, a popup box detailing the effect shows up.
There is also no way to check what is in your discard pile which is useful for certain cards.
You can check your discard pile, as well as your opponents. The menu is often covering your discard pile, but if you hit the arrows or whatever to hide the menu momentarily, you can then click your discard pile and check it.