Read his post.
I believe he did. He just said that Bitcoin has indeed changed a lot of times in the past, to improve the way it works.
Correct.
He believes a change in Bitcoin’s POW “or some better model” <- not sure what that means
I guess he said that PoW will either be changed or a new mechanism will replace it, although I doubt for both of them.
Yes, although i doubt it'll happen anytime soon.
It is not the case, because merged mining is not activated.
BTC miners have warehouse full of ASICs,
thinking they don't switch back and forth for greater profit gains between BTC and BCH is naive.
Switching does not require merge mining. Switching
isn't merge mining. On merge mining, you mine multiple coins at same time. Switching simply choose one coins to be mined.