I think this ilvl 590 gear we get from the vendor is kinda like a luxury item so we can do content easier, but the ilvl 580 gear especially the one from crafting is already enough to finish all savage content in the tier, and this luxury is specifically for person like me that doesnt want to do current savage or even extreme but still want to get a progression, if the raider get their gear from doing tough content like savage and extreme, we the casual can also get that but timegated which is fine by me, i mean my 2 main class already fully ilvl 580 from normal pandemonium and crafting, and for me to get ilvl 590 every 1 or 2 week from casual duty roullete is perfectly fine for me since i probably wont do savage anyway, and the reason that we only still capped to 450 because it means to focus on 1 class first to be fully ilvl 590 geared, it doesnt matter how much class exist out there