Just an onlooker... but if you changed the policy to an automatic 90 or 180 delay between notice of tz change and public release of new databases versions... that would tend to draw public attention to violations of the policy.
That would be causing pain to people who can do little about it. While deeply satisfying, it would be the wrong thing to do for our users.
See the list of countries that make these last-minute changes, and look them up on the a Transparency or Freedom list.