Novice
Controls are used incorrectly or could be exchanged for something more appropriate / simpler / more elegant.
Competent
Interface controls are used appropriately to their purpose—buttons, navigation elements, form controls, links, cards, etc.
Proficient
Controls leave no doubts about appropriateness and/or it’s clear that multiple options were explored to determine the most effective controls.
Expert
Combo or less conventional interface controls have been tried and tested, with clear user-centered reasons for the chosen controls.