That's not quite correct. I have been in this lounge several times and a couple of times people were annoyed about only one elevator (which was mentioned in the online article at 7:20 am as I read it for the first time) and that they had to wait.

One time (January 07) I was in the bar area, where a group of passengers were waiting for the elevator. They boarded and the elevator went down to level one where a couple with a buggy and two childs tried to board the elevatror. But there was no space left (and the elevator is not that small) for additional four persons and buggy so they had to wait. The elevator went down and after a minutes up again. But this time the person in it wanted to reach level two, so they had to wait another going minutes.
They seems to be annoyed by this procedure and as far as I noticed complaint about it by the agent serving the front desk.

But honestly this is the same at the SEN lounge at Richard's homeairport, where you have to use a elevator or stairs to reach the entry of the lounge. The only different is, you first enter the lounge and the have to take the stairs in ZRH while at the most airports it is the other way round (e.g. Frankfurt B Concourse, Düsseldorf (where the elevator did not work in three out of ten visits in the past), TPE, where some lounges are in the Mezzanin Level and could only reached by a narrow staircase.