So today I didn't achieve as much Tekkening as I would have liked. I played the Mishima Story up until Chapter 4, completed Arcade with Asuka, and had about three or four online fights. One with Pumpkin (I'll get you next time!) and a couple with someone in a player match. Then I created a session with someone on my friends list. It created a lobby but it wouldn't sync the game, so I got them to make one and invite me. Same thing. I even reset my router, closed the game down properly and reset the PS4 to restore internet connection, and opened it up again but then an error message came up saying that my save data had to be reformatted and I lost what progress I'd made which thankfully wasn't much. So yeah, when I next play I'll start the Mishima Story again and try out the treasure battle mode. Online will have to wait until it's fixed.