Unpopular opinion/hot take: Pearson (allegedly) increasing the difficulty of QR is a welcome change in terms of being able to better differentiate between higher-scoring candidates whilst not impacting the rest of the candidature. Just taking a look at last year's UCAT results, you'll see the majority of users scored 800-850+ in QR, which causes a "bunching-up" of scores at the top end and not permitting the bell curve to run its course. This is obviously an exaggeration but you get the gist:
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The QR average seems to creep up year by year, it was 660 last year. Adjusting the difficulty of the exam such that the mean lies closer to 600 (like VR, DM and AR) will give a more accurate representation of the cohort's performance.
Now obviously, if QR is as hard as the official mocks, it looks like Pearson may have dialed the difficulty up too far