Patch 11.0.5 brings a long-awaited update for transmog collectors! Players can enjoy more flexible access to class-restricted armor sets, including MoP Remix transmog, with armor and weapons open to any character that matches the gear type, regardless of class.
During MoP Remix, many sets had the “Appearances only usable by a certain class” message. Now, if you have a set like the 
Arsenal: Armaments of the Holy Avenger and 
Ensemble: Plate of the Holy Avenger, which were Paladin-exclusive, any Plate wearer can use these!
Restrictions have been lifted for all types of gear, including Trading Post class weapons and armor!