I love GTA:O I just hope the PS4 version isn't broken. You try and join a friend, you go into the clouds for upto 3 minutes and either "Player not in session, player cannot be found" or my favourite "Session is full" The first two are lies as a rejoin or two gets you in, but the last one could be an easy fix?
There should be a server number or player count next to people names you're trying to join, or maybe even a wait list for a server. I swear sometimes it can take 15-20 minutes to eventually join a friend and then the inevitable... "Lost connection back to GTA 5" or other people just get booted.
You can be a passenger in a helicopter, all of a sudden your friends voice cuts out. Your friend has vanished and you crash into a building.
Don't get me started on the console lock-ups...