I had some spare time, so I modernised the PSSWD interface, a little. A mixture of Helvetica Neue Light & Thin was used, instead of the system default font. Which has made a difference. The buttons have also changed from being square to rounded with a transparent background and a coloured border.
The new version is available here: https://itunes.apple.com/gb/app/psswd-password-generator/id898897162?ls=1