Agreed! We are playing the PS5 version now in couch co-op. We come from playing both DOS1 and DOS2 on PS5 as well, which we enjoyed A LOT.
The way split screen was handled in DOS was so much better in my opinion. I'm hoping this isn't the final experience and that we'll get the same features eventually, but I'm worried that this ends up not being the case.
The performance in couch co-op itself is quite problematic. The controls feel sluggish, and the pop-ups take seconds to open up every time. Hopefully this gets improved as well.
All-in-all I expect things to get better, but I'm a bit disappointed at the moment. It seems like the game required more work for the PS5 version before releasing.