Flames of Devotion Dual Wield Potential Exploit, or Mechanic?

[jwaysted]

I am currently using a Bleakwalker/Soulblade, dual wielding weapons which means FoD slashes twice since it is a full attack. 

If I kill an enemy with the first strike of an FoD, I can immediately retarget and strike another enemy instantaneously and FoD will proc the full attack. No cooldown/recovery time at all. 

I am not sure if this is an exploit or intended, but it is quite powerful.