Just tried the Exalted Angel change to the Flaming Blade Barrier that follows you after very fire/light/positive damage/healing is done.
And I'm not a fan of this particular change.
This change does absolutely nothing for solo or group play. In most cases you'll be lucky to get one "tick" of anything AND THATS IT.
So tests on how it works in Lam now, once active and triggered and kept up (say with an Archon), what do you get? The first initial tick of damage or healing to yourself or allies if you do not move.
Lets say we're solo'ing, so we stay mobile. We ONLY get the damage portion IF enemies are moving in and out of our barrier (either from them moving in, which is just the first time, or if we move out of the way to get them out of the way, but that will be harder to do easily due to speed differences). We only get the initial tick of healing when the barrier goes up. We ourselves, get nothing more as we can't move out of the barrier ourselves (as mentioned by a poster above this one).
If we're in a group and trigger this, we risk damaging enemies we don't want to and gaining aggro (again, mentioned by others) and of course, we only ever gain the first initial tick of healing whilst it is up. And if we're healing constantly, this Barrier does nothing of worth unlike how the Aura works right now on Live.
I would propose that the Mantle has two version, one a toggle for the Barrier that deals damage (which really needs more work on it really). And one for the healing "whatever", with my preference being a return to the old existing Live healing Aura; so that once triggered, it ticks every few seconds to heal everyone in the Aura AOE. This way you don't have it always on as in Live right now, but also won't make it super situational for use either.
J1NG