While I can appreciate the concerns of players regarding unauthorised mods/ bots etc.
If SE gave us the option to select from a few different UI skins produced "In House" so to speak.
Where would the problem be? Sure it would be diverting development time and skills away from other key areas that need improving first.
I would be fine with waiting some time to see the implementation of UI Skins.

Higher on the list of UI improvements should be Player Assignable Hot Keys.
Seriously I want to Assign I,K,J,L to
I = Inventory
K = Skill Window
J = Quest Journal
L = Linkshell
Not some dodgy camera controls.