I have noticed a significant drop in frame rate performance since the 1.07 update. It seems a lot worse when you're running as the frame rate makes everything seem like it rapidly stutters. While there were occasional stutters before, the performance overall was acceptable (not counting vehicles which lag horribly).
I'm not sure what changed but I actually had to log off the other day due to how bad it was. This is all on a rented, 10 slot server (LA). I have a standard PS4 with an external SSD but that doesn't seem to matter as it appears others with PS4 Pros, etc. are having similar problems.
The game was ok before the update in this regard. I'm now regretting re-renting a server when 1.07 released as the game is really unplayable for me when the frame rate drops as badly they have been as it's simply annoying and not fun at all. I just hope this is something you folks are working on and that we don't have to wait for a fix until the next big update or weeks later, etc.