What (still) makes cleric "better" than FvS for this type of build is the number of spell slots. Even if FvS had the prestige, they couldn't afford the spell slots for the full lines of light and necromantic spells.
I've been playing with Sunbeam, Sunbolt, Sunburst, Enervation, Necrotic Ray, and Word of Balance. All FANTASTIC spells that go in the spell book, which means they replace other spells. I'm also squeezing in (at epic levels) a full range of long-casting buffs. .
I can still do full raid buffs/heals, both single tanks and massed group heals/cures. I don't really "miss" the aura. Yes, it eats into my spellpoints for healing to give it up, but frankly on a 1st life cleric with minimal gear aura doesn't get good for healing till level 17-18 or so, and I take two mental toughnesses on my first life runs (I'm using clerics to unlock favored soul on each server so my 1st life clerics are truly poor and gearless). I need that much mental toughness to get through Shroud healing _with or without_ the aura.
Burst really does work 'just fine'.