Looking at the key points here, or a different summary here, I really can't see what would be different if the red lines were different.
The future relationship, absolutely, yes. But the WA covers a divorce payment, a transition period, and an Irish border backstop. I can't see any of those changing. So what do people think _would_ change? Is there a decent writeup covering what would be different? What am I missing?
Original post on Dreamwidth - there are comments there.