Have you tried adjusting your settings? Turn off other player's VFX? Stuff like that? There's no way that the PS3 is that bad without there being any way to fix it on your end, unless you have similar or worse issues in 24 player raids and S rank hunts. Besides, unless you're healing, (and for some reason manually targeting instead of using D-Pad targeting), being able to see the other players doesn't actually prevent you from playing the content......