Also imagine there's a possibility of pally-sinx marrige, which would be quite a dangerous combination. If pally happens to summon his loved one to the WoE map, then cast devotion on them - the person can ecall very very easily. Considering that, even if a person ecaller (or whoever really) is married to dies, it won't cancel the skill, is another strong point against this idea.
I'm not sure if there's any way to actually do what you just suggested unless the entire purpose of the skill is changed - which I doubt many people will like.