I don't think the FPS display not existing makes the game run slower because it's just a UI display.
They're talking about the cap (i.e. the maximum FPS you can get), not the display. The cap lets the game run smoother for some devices since it doesn't quickly fluctuate in FPS.
I haven't played the new update though so sadly I don't have a fix.
Ah, makes sense. Hopefully there's a way to remove the cap in the next update.
