Direct notes from the developer:

Faster database mode boot.
Reworked the new player experience to help new players learn to use the plugin faster.
Greatly reduced the frequency of the "you're building outside of land claims" warning.
Config cleanup.
Login cooldown is now set in seconds for more customization and better player experience. Default is now 60 seconds (from 2 minutes).
Removed option to require land claims before building in survival mode (nobody was happy with this, now matter how I changed it).
Removed donation chests option (not anti grief, belongs in an extension plugin).
Removed the option to disable automatic claim cleanup in creative worlds (source of griefability).
Whisper/sign eavesdrop is now on by default. Was off by default before with privacy in mind, but now servers log all whispers anyway.
Removed the option to disable building outside claims warning (see above, should not be spammy anymore).