Is use of a question bank really underhand? In my experience looking at a comprehensive question bank pretty much covers both MATS 1&2, therefore making you go and read up on both and know pretty much everything you could be asked.
What it highlights is the style and type of question you will be asked. It's one thing knowing the questions, but you have to know the answers, whether you know what you may be asked or not.
I don't think there has ever been a qustion bank that tells a trainee that there are only a few topics that they need to learn to get through!
At the college for me the biggest indicator of what you may be asked was never a question bank, but a knowledge that certain instructors had 'pet' subjects like Met, ATSOCA, etc and brushing up on those was always more invaluable than any question bank!