Although I like your idea, I'm not sure it's that simple.
If you look back at the article on Smites you see that they include:
Renewing Smite
Paladin 13
Encounter • Healing, Weapon
Standard Action
Melee weapon
Target: One creature
Attack: Charisma vs. AC
Hit: 2x[W] + Cha damage and ally within 5 heals 10 + your Wisdom modifier damage.
That doesn't seem to fit with your healing surge theory as the amount healed is set by the character doing the healing and not the reciving character.
If you look back at the article on Smites you see that they include:
Renewing Smite
Paladin 13
Encounter • Healing, Weapon
Standard Action
Melee weapon
Target: One creature
Attack: Charisma vs. AC
Hit: 2x[W] + Cha damage and ally within 5 heals 10 + your Wisdom modifier damage.
That doesn't seem to fit with your healing surge theory as the amount healed is set by the character doing the healing and not the reciving character.