Thanks for playing the game!
The idea behind the discard option is just that-- an option. As you play the game more, you'll know what is good and what is bad. Due to limitations, we couldn't do a full preview of each card so this was the best we could do. Sorry about that.
We have also been trying to iron out bugs, but there may still be a few out there we don't know about yet. Thanks for letting us know!