I am 100% against origin characters in their current form, it feels completely against what BG is and they are without a doubt made to be superior to the custom character that we can create as they have access to everything custom characters do plus their own origin character stuff, it feels incredibly on its head, basically forcing people to play as origin characters to experience all the game has to offer, making custom characters feel inferior. I would also love to see them just being scrapped as playable, instead give the resources to the PC character or even more towards them as companions.
I also think origin characters were a mistake as D&D usually means building your own character, not using someone elses. The biggest mistake was Larian using huge amounts of resources and time on developing these unlikeable characters while neglecting other aspects of the game like the UI and combat mechanics.
