Color customization is plenty. Aura effects would be cool the way enchantments work. [b]However,[/b] like WoW, they could implement it down the road. A great way to give some value to sets that you will eventually replace in future expansions. Because I think that making gear look like gear you have earned is reasonable. Maybe one exotic helm looks cooler than one with superior stats? An inspection could display what they're using and what it's transmogrified as, so that the whole "showing gear that you've earned tells a story" is enriched, not detracted from. TLDR: Add it down the road to keep gear relevant in expansions. Transmogrifying gear you've earned could be cool as long as it shows information for BOTH the equipped and the original.