Quote Originally Posted by Jollyy5 View Post
Set bonuses in an MMO are one thing, but interchangeable "keystone materia" for set bonuses would be pointless because people would math out the best keystone on day one, and so there would be no choice to be made at all.

Unless the keystones didn't affect your DPS in any way.
And set bonuses that you don't get to choose from are pointless because you just change from tier to tier.