I know it’s been a while, but there is one user on my “home” forum who still occasionally complains about how he lost TL3 back when Likes were added to the list of requirements for that level. During the most recent conversation regarding this, we came up with an idea that we believe has continuing merit, especially since the requirements for trust levels can be modified by admins.
How about applying a grace period when trust level requirements are changed? The grace period could work exactly the same as that used when a user achieves a new trust level.
For example, say that an admin changes the requirements for TL3. Any users who are currently TL3 would automatically be granted a revocation grace period as if they had just obtained that trust level. Anyone trying to obtain TL3 would need to meet the new requirements as soon as they are implemented, but those with TL3 who don’t meet the new requirements would have some time to get “up to snuff” before they lost their trust level.