Originally Posted by sezz
I didn't know about this issue - been using a similar namplate style since Ulduar was released, same font and also set to outline, so I didn't expect that it would make any difference. Well, learned something 
I also just did a test on live, with 170 visible nameplates and moving my camera around my FPS only go down to ~80 and it doesn't matter if I enable outline or not. Maybe it's related to the animations that are tied to the nameplates now, or they just aren't yet optimized and that's the reason why they are capped at 30. |
Since outline's usage strongly depends on the font itself, my bet would be it's caused by the higher resolution fonts used in Legion which makes outline's performace a lot worse too.
Your best bet would be to report the issue ingame.