http://www.wildstar-online.com/en/news/wildstar_ui_20_preview_less_is_more.php
After reading this article, I couldn't help but notice the similarities of the UI in Neverwinter.
Yes, the d20 is huge and very noticable. But the encounters icons are very small and not easy to read unless the player looks down, away from the action. Same for the HP bar.
Perhaps Cryptic could consider separating the different elements of the powers/HP UI? That would make moving things around easier.