First of all, thank you for your hard work on the quiz!! It has come leaps and bounds, and the great performance increase from 1.9's optimization.
My request of suggestion is related to the Quiz module. When I create a quiz, and add 100 - 150 questions to that quiz, removing questions from that quiz can be very time consuming. For example, if I want to remove 10-20 questions. I have to remove them one at a time. Is there a way to add a checkbox to address this? Or has this already been discussed?