Positive Spell Critical doesn't affect Consecration - Sacred Ground

Steps to reproduce
1. Equip a Hands of the Dawn healer trinket
2. Use Unyielding Sentinel as the Epic Destiny
3. Get Consecration and Sacred Ground as twists
4. Cast Consecration several times (tested for 10 minutes)
5. Notice that no healing criticals are generated.

Flame of the Favored functions in a similar manner as Sacred Ground albeit as a rectangular area of effect instead of circular, and it is affected by Positive Spell Power and Positive Spell Critical %. I would assume the same logic should apply to Consecration - Sacred Ground.