From now on, you'll be able to use drawings done by other users when you do not know how to draw the card you received or you simply do not want to draw it.
Once you get the card, you'll find the "Auto-draw" option right below it. By tapping on this button, another user's drawing will be displayed so you can take it and send it to your opponent. If you don't like the drawing, you'll have the option to edit or discard it and draw something else.
Bear in mind that this is a free feature and you'll be able to use it as many times as you want during games.