Epic does do UI/UX studies. It's got a lot of legacy code to plow through, combined with regulatory and customization demands that lead to best UX practices having to be bypassed sometimes. Striking a balance between too much information and having a clinician miss critical information because it was hidden behind a click or hover bubble is always a concern.

Regarding the campus, the theming is actually quite cheap. The bigger expenses come from employee QOL stuff like roomy underground parking to keep cars out of the snow.