I think its worth revisiting this topic as it once already was a few years back.
We need the cosmetic restrictions removed from armours (maybe in PvP as well so we don’t all look ugly as hell either? I highly doubt there will be any repercussions). Let’s be honest here, not all classes have good armour cosmetically and most classes are stuck with being unable to use the heavier, WAY COOLER, looking armours. There are many instances where an armour doesn’t look like its type either.
Another reason FOR this change:
Gives players a reason to visit old content, in many cases content that is a dead end, to get a cosmetic item/set they would originally not need. Restrictions being removed means that old content can be ran for the cosmetics you want. You want your barbarian to wear some cool plate that still looks like a more barbarian fitting set? Go for that! You want your Bear Shaman to look like a walking tank? Go farm that!
A simple reason to rerun old content otherwise you might not need.
Hell, you could finally make your character unique!
They made weapon cosmetics! They can make this as well!