I agree most will pass but why are we doing this, is it because our fleet and training offices are full of YES MEN who just go along with any crazy idea some manager dreams up. Most of those guys see the sim regularly whilst line guys see it every 180 days or so.
We are not all equal here, many RQ first officers do not even sit in a control seat for TKOF or LDG even as PM for a couple of months at a time. A practice ride before a sim which is examinable and not always marked on an even playing field does get you in the groove and enhances ones chances of passing which I would think would be the over riding objective.
Dragonair have been doing it PC first for ages but one very very different aspect is that they are flying loads of sectors each month and much more current than a CX F/O in the vast majority of cases.
C