If you've ever seen what stacking phospholuminescent infusion looks like, you'll understand why. It can get really preposterous. If that was allowed in PvP, it would be nearly impossible to see tells. I almost always agree with ya, but I have for a long time wanted infusions to work at the least in the PvP lobby. In addition, I think if the following things are done, they should even be let in PvP matches, so long as standard models respect a "no infusion on standard models" policy: Implement an "infusion effects" slider to the game, that way you can turn all infusions on or off, or find some middle ground. Decrease the amount of stacking that is possible so that visual clutter is reduced. Some folks pay 17k for a chak infusion, and I think it should be visible across the board :)