Its april 2016 yet no healer stat weights???

[Ghishlain]

That was true in ARR when a crit hit was a flat +50% damage, but they changed it so critical damage increases with critical hit rate.
Base: 5% chance +45% damage
+10%: 15% chance +55% damage
+20%: 25% chance +65% damage

One also has to note that the Crit damage+ means nothing to a healer from a healing standpoint (Healer DPS is another matter), so Lyrica's analysis for straight healing is on point.