There are some easy fixes to the things I described - like adding a list of offices and floor numbers above the touchpads, or adding a phone signal boosting indoors antenna.

Apart from that, the first thing I wondered when I moved in was "oh, as a resident, does that mean I just get a keyfob I can wave at this screen that knows I live on the X-th floor?". That's also feasible, to the degree that the Wikipedia article linked above refers to this.

The problem with all these fixes is of course that they all cost more than $0.

And neither the company owning this building nor any landlord company involved in its operation is even based in the same ZIP code as the building. So why would they care?

Most of the problem described here is the input mechanism. The building I work in has "destination dispatch" too but instead of a touchscreen, it has a large numeric keypad that you type your floor number on, with physical buttons that look like normal elevator buttons. We do also have some floors that are open to the public and i've only seen people confused by it a couple of times in several years of working here.