Such changes that you proposed should be rolled back automatically at a fixed date which is decided before the implementation.
Only if the community likes the changes (let's say 3months testing) they can vote to NOT roll back the changes (stake weighted of course). It should also be a mandatory vote. You cannot access your account unless you voted first.

I think the biggest challenge is that people fear that it might make things worse without a chance to get "the old" steem back.