That seems to be it! I was completely unaware of the differences between what lenses PSVR2 uses and what's generally used elsewhere, but after looking into it that seems to be one of the main drawbacks of the headset once you get past reviewers generally hyping it up, oh well. That and the Mura effect, of course, but I noticed that one relatively quickly and realized that I couldn't really get rid of it, unfortunately.
I guess I've got it setup as well as I can conceivably get it then and it's indeed not that bad after a few hours. Thanks!
I'm rounding off the year with The Last of Us Part I and so far it lives up to my expectations (and even more).
I've also been playing some PSVR2 recently, I recently completed Moss and just started RE: Village (and it seems I've almost got my "VR legs", I wasn't really feeling nauseated after the first session).