The PS5 version of the game becomes progressively unplayable in split screen until it becomes completely unplayable.
It started off really well - the first 10 hours of the game were great and we were loving it.
Somewhere between 10-20 hours we began to notice performance issues. Specifically every time either player switches characters the game freezes for a few seconds. This includes out-of-combat, in combat, and even when ending one turn to being another. This is very interrupting but, but was somewhat tolerable at first. I don't know for sure, but the length of the delays seems be increasing as we play. We are now at about 50 hours.
However, more bugs have began to arise. I have submitted a few bug reports via the tool, but the bugs or performance issues have become too numerous / frequent to keep track of.
Sometimes cut scenes do not play video at all. Specifically the entire encounter with Raphael was a white screen. There have been other instances, but less egregious and than this.
Sometimes during cut scenes the audio will stop playing for one or two lines (mouth animations stop in sync with the lost audio), and then picks back up again. Subtitles remain accurate.
Once during play my custom character simply disappeared after a cut scene - leaving me controlling my companion instead. Gone completely, no way to recover. We had to load a previous save to recover him.
The final straw for us was a bug that started cropping up when we first reached the mountain pass - our companion characters would not be able to move in combat. We would get no cursor. We could activate ability, switch characters, access the inventory, really do any other action, except move. This is obviously game-breaking. At first, it was rare, or infrequent, but tonight we quit because it now occurs on every single turn of combat.
If we did not have so much fun playing D:OS I and II in split screen, we would probably be asking for a refund. For now, we are just going to put it down and hope these issues are resolved. In the meantime, I suggest anyone looking to play in split screen avoid it for now.