I think XIV will drop the PS3 at 5.0.

I don't see any compelling reason to drop it at this time. Also, I'd think SE would give PS3 owners a lot more notice if they were going to be dropping the game from that platform.

Dropping the ps3 at 5.0 makes sense though considering the PS5 is rumored to be launching in the fall/winter of 2018. So that expansion could be made with the PS4/5 in mind, allowing the game to take a refreshingly big step forward.