Man, that was fast. Ubisoft Massive have issued a patch for The Division that pretty much stops the respawn rate for it seems like all the Phoenix Credit farming areas around the city. Yep, each and every named enemy in the oven world die once. When they die, they stay dead. Presumably they'll have a respawn rate but you can't just kill them, die, repeat. Now we gotta get those Phoenix Credits legit. Damn.
In other news, Ubi Massive also loosed a wave of other fixes, from improved fast travel to Dark Zone checkpoints from the PvE to better loot drop rates boss enemies in the DZ. The full patch notes, and there's a ton if you feel like reading them all, can be found here.