I'm not singing up for the PS4 beta because if you get the ps4 version you can no longer access the PS3 version, which is a problem if the PS4 requires you to have PS+ to do multiplayer.
Seeing as the PS4 was just released and people are now learning of the sub requirement on ps4 multiplayer, I feel that Square Enix should clear the air and definitely say whether or not we need a PS+ subscription to play FF14 on PS4.