Originally Posted by
Mansion
You'd need a ton of Spell Speed to effectively experience better mobility (which in itself isn't a problem because it's part of caster gameplay in general, learning how to properly plan movement). And remember that with that huge amounts of SpS, you would have dropped Crit and Det, so your fast heals would heal less, thus you would need to cast more heals throughout the fight. It's just not efficient at all in the current system.
Healers just need integrated MP mechanics within their kits (well, WHM and SCH have them so it's just AST) and Lucid, and Piety could be dropped entirely. We need yet another healer rework in 6.0 just for the stats.