Plants Vs. Zombies answered me on Twitter about PS4's FPS/Lag Turf problem.

@GutmanSca Thanks for the post. I'm interested in your point about certain PS4 models. Could you grab your model number, and your cousins' model numbers too, perhaps there'll be an overlap. 

Also, sometimes we've seen some strange performance inconsistencies when folks have games installed to external HDDs/SSDs. Do you have the game installed to the internal HDD or an external one? If the latter, what device are you using? If you can get that info from your affected cousins that would also be very helpful. 

Finally, I want to check for ventilation. You may have checked this before, but if not, please ensure that your System has sufficient airflow and isn't being blocked by dust buildup. I personally had to clear my vents and move my system when I had some overheating issues a few years back, and that hasn't come up since I've been regularly cleaning the vents. It may not be the case for you, but it's something worth checking regularly anyway for your hardware's health. 

Also your other thread on this has lots of good info and perspectives too. 

Hey man! Thanks for responding, and here is what you asked:

I couldn't get my cousin's PS4 model number, I will try to send this to you later, btw here is mine: CUH-1115A. People who are not having these lag/fps problems probably have superior models than mine, my cousin, and my friends, or have PS4 pro.

My ventilation is open to air, I through this was the problem in the first place, and I tried to clean it up and move my PS4 to an more open space for the ventilation. It worked just a little, the problem still happens in Turf, where the map is bigger with way more players than Team vanquish and other modes.

In my perspective, this is what happens: the game is laggy by itself, some abilities are way difficult and laggy to use, hit detection still buggy, and other problems. What happens is that Turf just gets this and makes it worse, the quantity of animations, players, the size of the map, all together with the previous problems that I mentioned. 

If you guys want me to say all the problems I see in the game I can say it to you, I have lots of them, but the biggest one in fact is the performance. In GW2, this never happened to me, even in full lobbies with lots of abilities spaming. 

Again, thank you for responding, I just want this game to be best of the best, and I'm going to help with Anything you guys need.

Oh, I forgot: I'm not using an external method to install and use the game, is all inside the PS4. and there is like 200 G that I didn't even used.

Split-Screen & Co-OP Lagging completely unplayable!

Every single time my daughter & I play split screen on every game turf takeover, ops, weekly challenge game, gnome bomb all other games available with split screen against co-OP other internet  players.   Our characters ate in complete lag they move like 1 inch at a time it's completely glitchy but only in split screen co-OP against other internet players.  It's unplayable please respond & fix this.   This is the only reason I bought this game for my daughter to play with me split screen