Guild Wars 2

Originally in GW1 you could acquire items that you could apply to an item to change its prefix functionality.

A NPC to change the prefix stats for armor could be an option, with a small fee for each piece.
Or let the crafting professions make items that allow a one time use to switch to a particular stat…for example you have a berserker’s but want to try rabid.
or maybe a Mystic Forge Recipe that allows the item and the three stats you want to have representative mat’s for each prefix type, say Ruby’s for Berserker’s .

I don’t know how to apply specifics, but I assume some would say that then you could do away with prefix’s on armor bought from dungeon tokens. Making the choice clear and cut, you want the armor look you can get the stats you want and change your mind anytime you see fit.

actually its a terrible idea

As far as I know, and read in datamining threads, this is coming soon.