This is probably another attempt of the MTR to upgrade its service.
When I got off the MTR today, I saw an MTR employee standing next to the door of a carriage announcing to the boarding passengers where the train was heading to. He sounded like a tout.
A few steps ahead, at the bottom of an escalator, a man with a megaphone was reminding the commuters to mind their steps.
Evidently, the various announcements in the stations, including the non-stop recorded reminder "Please mind your steps", in Cantonese, Putonghua and English, which accompanies your every trip up the escalator, is now considered not enough.
The two employees won't be pleased, but I would argue that their jobs are not needed. But then in such a nanny state in Hong Kong it is another story.