You must be tactical when to use this giving option. Example, if you've just ran a big bluff with 74s, go ahead and show em. If you hit the nuts, using only 1 card from your hand, show them only the other card which will make them think again that you bluffed them.
Now you can go ahead and get MAX value with your future nutted hands easy game.
It delays more the gameplay , I have disabled it , it irritates me all the time to see this option after a hand when I am last to play . Show one of them or two , oh man . They should speed up more their games , maybe cut in half the time you have to show your cards , it would still be enough .