Bummed out they fixed several hundred things but didn't even address this.
That being said we've been enjoying the game on PS5 following
this Reddit thread. Essentially you play without splitscreen but with two player made characters and assist controller enabled in accessibility settings (it is no longer in beta like in the thread, this feature is now available to all).
Pros: you get beautiful game, combat works exactly like in Divinity, dialogues are immersive, romances etc. still work for both characters
Cons: you have to take turns with who is exploring etc. BUT you both hold a controller and can switch to your characters with just two clicks.
I know it might sound crazy... and it is definitely no excuse for not having a proper split screen.. but we already played 35 hours like this and we're finally having fun. Is it perfect? No. Is it hundred times better than the botched split screen? Hell yes.