WowAce

What is the enhancement in mind? How should it look and feel?

A shield/barrier indicator.  At the moment Xperl seems to lack a way to indicate whether you have a damage absorption effect on your health bar, such as power word shield or shield barrier.  This is absolutely essential for certain raid fights like malkrok, where your shield is your health, and your actual health remains the same throughout most of the fight.

Please provide any additional information below.

I enjoy using Xperl, its an excellent addon, and I havent found any others I like more.  But the absence of the afore-mentioned feature is a game breaker for a raider.

Still need to understand how that works in the default frames

@Asixandur: Go

You needed a priest character(and played fully) for that, I guess.

:p