How do you know it's overkill? For all we know the building could be mixed use with even office spaces on the top floor. I wouldn't say 'overkill'...Ok, now that's just ridiculous. I understand maybe 1 level over the loading platform for possible queue and 1 under for maintenance, but two above and below is overkill.
The first picture suggest the platform is going to be at the very top of that structure. I wonder if we're looking at a similar layout to Thunderation with the majority of the layout coming from a drop straight out of the station.