1. Weapons are visible when dual wielding fist weapons, instead of making you look like you're hitting mobs with bare fists.
2. Legendary items can be transmogged into other things. (But not vice versa so not everyone will be running around with Blades of Azzinoth) My shiny cloak does not fit my transmog set at all, and hiding the cloak makes the set look stupid.
3. Fourth talent spec for all classes <3
4. Necromancer class. Caster that focuses on death magic and controlling hordes of skeletons and other undead to do their bidding.
You can transmog looms, at least I could when I mogged mine. The effect will just be lost if you mail the loom. Was fun though when it didn't disappear when looms mogged to high end tier sets could be sent over to lvl 1 toon Was fixed double fast.-transmog heirlooms