As most of us know the Defib sometimes went faulty, the defibrilator charged at friendly then theres only electricity animation on the target body but not revived, or when you need to revive a couple of downed friendly suddenly it got delayed when you tried to press E again.
Reducing the Defib delay could remove this problem.
but i dont know about if it would elevate the Defib kill and making it better than melee weapons.