These may be broken into several separate tickets, but let's list what we'd like to see. Logging:
log cardtype change
log name changes
log deletion/recreation
Changes tab:
shift from current one-version-at-a-time to listing all versions back through time, both content and above-listed changes
diff between arbitrary versions
also list settings changes? (these are logged in the relevant cards, including permissions after we setting-ize permissions) Maybe only +*self settings changes? Hrm.