Heya guys! It’s been a while!
I can back up that the P5 items aren’t in; if that Draconic Infused Emblem were in the game, things would have been very different gearing up for raids! A lot of those items are straight up upgrades over MC gear.
Anywho, I thought it relevant to also point out I’m pretty sure Argent Dawn shoulder enchants are unavailable until Naxx (P6) comes out! It’s tough to verify, since I’m not Revered with AD and can’t confirm if I can get the quest or not, but it looks like AtlasLoot for Classic is on point (plus it makes sense for all the Argent Dawn that doesn’t become available until Naxx to do just that!)
That said, I’m not sure where their info came from, but AtlasLoot Classic has been spot on for which phases items are available in Classic (except for the exceptions, like when Blizz pushes content out ahead of a phase).