Wouldn't supprise me if there is multiple big player saboteurs within BCH. Heard rumors some other coins were token over by multiple saboteurs (Monero ect.). Hence the big splits?
They can't. Let miners decide and go by majority hashrate. We can have a minority chain but I think it's not a problem if it's not that big. Bitcoin Clashic for example.
Pre-consensus does not change consensus rules. So, even if one client implements something like that, the network is still working on the same consensus rules.
1) So let's say some miners use pre-consensus and then others don't. Then a miner not using pre-consensus includes a tx (potentially double spend) that was not agreed on in .....
I'm happy that BCH is very good as it is right now. Maybe if we split again will prove that we do indeed need dictators in this world to show which path to go? ;)