Hello I have been experiencing very bad jitter when playing fifa, I have tried everything possible to resolve this issue, the game is not enjoyable when you have a disadvantage. I have tried port forward, DMZ, wired connection, wi-fi, modem mode. I actually think there is an issue with my connection.
Sorry to hear you're having trouble with Fifa 16. It certainly sounds like you've tried most of the fixes for this already. I've checked your connection from here and can see no issues. Your power levels, SNR and contention are healthy. It seems lag issues with Fifa 16 are fairly common regardless of ISP. I've seen a few users have changed their DNS servers on the PS4 to the google DNS which are 184.108.40.206 and 220.127.116.11. Give that a try and let us know how you get on.