OK here comes the frag under your door...
I think the only section of Cathay Pacific that call the Cathay City to Airport Terminal transport a "crew bus" are Cathay Pacific crew. To others it is the airport bus. It is true that a large majority of its users are crew, but I wonder if anyone has done a survey to see what the percentage is, and therefore what the requirement will be.
If as an office worker at CX city I need to be back at 14.00 for a meeting and get offloaded because a crew member takes priority, how would I feel? Yet another reason to resent flight and cabin crew I would guess.
Let's attack the problem, which is cost cutting on airport transport. We simply need more buses as peak times and screw the marginal cost. CX should provide a basic facility for all staff and their dependents.