“The rules enforcing this should be immutable (i.e. voting, quorum)”

It’s very hard to give rules for determining when hard forks occur that lead to the representation of users/clients.

“Banning transactions (and/or reversing normal operations) is the beginning of the end for Ethereum”

None of the proposals do any of this. They surgically tamper with the state of the consensus, they don’t censor transactions or revert operations. It’s more like divine intervention than censorship or reversion.