Guild Wars 2

Have the ability to add and remove skill individual attributes of any skill (even weapon skills) to create special builds that can counter other builds (example would be to remove all conditional applications of all skills used to prevent its use when needed). Specialization traits are more of blanket attributes while these modification are for individual skills to further enhance build customization.

The problem with this is by and large people tend to play the same thing (“meta”) so instead of creating build diversity it just becomes another build efficiency race where unskilled people follow the leader(s).