1) Dual-wield 1H sword/axe transmog!!! Nothing cooler than having 2 swords on your back
2) Mistwalk for MW. I loved this spell so much, I'm happy for them to disable it in PVP (was obviously OP), but I really miss it for PVE. It was a fun way to move around in M+/Raids
3) WoD style BrM, but that's never going to happen .