My quest first began 04/21/10 with this thread asking for the location of the regeneration stat, and when I learned it wasn't available, I asked for it in the April 20, 2010 Engineering Report. Amazingly, dstahl responded, saying he'd forward my request "to the UI tooltips guru."
On 06/04/10 I started a thread dedicated to the addition of a regeneration stat and damage removal stat, and a couple of days later the Shield Emitter (regeneration) UI addition was found. Sadly, that was removed for no apparent reason (or comment in the Release Notes) by July 30th of the same year.
On 01/24/11 I started another thread asking for these vital UI additions. Many posted showing their support, and the thread stayed active for months, but was finally closed when it regretably turned zombie.