There are a considerable amount of advantages with the PC version over the PS4 version. It seems you are frustrated with the performance you are getting which I get, but as Philtastic has said the PC version clearly outclasses the PS4.
The main issue I see is that you are stuck on using 4x MSAA with TXAA. I know a lot of long time gamers can't seem to separate themselves from MSAA, but its really an archaic form of AA nowadays. The way games are built now is just not conducive to using MSAA. The performance impact is huge, and MSAA doesn't even affect most of the image, which is why you would need to enable TXAA to add a post process element to it to affect alpha textures and all of that. 4x TXAA in this game is a massive performance hit and its simply not worth it. If you are chasing 60fps FXAA is the only option...unfortunately that is upsetting to many people who have Titans and are still married to MSAA as their AA of choice. I moved on from MSAA years ago, I don't even think about turning it on in recent games, its simply not worth it.
As Philtastic also said, you are using PCSS with all other shadow settings maxed, which will also crush performance, and adds a CONSIDERABLE improvement over the PS4's shadows. Even using Softest is much, much better than what we see on consoles.
As far as grass, if AO were working properly there would be no need to use Ultra grass. Very high grass with working AO would look almost identical I bet. Also the console versions seems to have "hand crafted" additions of grass in spots...that is to say there are sports where more or less grass is added likely to keep performance stable. On the PC version, I believe Very High grass is better than consoles in a bunch of areas....it may match consoles in some areas but in others theres more I bet.
There is also a difference between Ultra and Very High PostFX. There are changes to lighting effects that are noticeable IMO.
Also, 60fps is a considerable upgrade. Its double the framerate, it makes the game feel totally different to me.
I would suggest you drop MSAA. I really don't think the FXAA implementation is that bad, I've seen WAY worse in other games. Anyway hope you get to a place where you can enjoy the game because I do think its a pretty good port.