Ok, ask a question and I'll try my best to answer it. But as you are waiting for a detailed answer, I'll have to spent a significant amount of time replying. So please make it concrete.
i know splitting the blockchain into 2 is not needed.. SWliteclients can prune what they like how they like without messing with the real blockchain.
i understand the benefits of adding new opcodes..
but the real question is.. how is the fraud proof so special that only SW proposition can implement it. explain how the fraud proof works in your own words