The PS3 version of the game is known to have trouble with the game, lag and load times most noteably. Any sort of performance issues you're having you won't see on the PS4. It will run just as smoothly as though it was on the PC. I own version on all of the platforms and played on all of them. And you'll find that the PC and PS4 are pretty close. You can even plug in a mouse and control it like you would on the PC on the PS4 if you so wish. The only thing I can't confirm is I don't think your settings and hotkeys will transfer from the PS3 to the PS4. I played on the beta on the PS3 so I didn't have to really do any transferring. I most work between the PC and PS4, which does require you to re-set all of your settings and preferences. Though I think there is a way to save your stuff off the PC and transfer it. Don't know if that works between PS3 and PS4 though. There is an upgrade for PS3 to PS4, so there might be something that transfers that way. Someone that's actually upgraded rather than just buying a new copy could answer how that works.
If the PS4 is your only options to play the game I'd totally recommend it. You'll find it is far above better than your experience on the PS3, I can assure you that.
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