You are talking about two different issues.

No one said wait on the platform.

OP said:

>If you are going where the line is you are in the wrong place. Use the lower concourse to board.

There are 5-8 stair/escalators onto each platform. There is no reason for everyone to wait at the one in the center of the new building.

You can still wait at the other 7 for everyone to get off before going down