Please find below the release notes for smaller items in AMJ:

1. Option to delete message in Bounceback campaign's rule.
2. Display opt-out char length for SMS in the message preview section of summary page.
3. Increase in the maximum size of audience list upload (in the Audience manager) to 10MB.
4. Option to edit an existing Outbound Campaign's name and extend end date.
5. Audience List - Merge and Dedupe feature
6. Real-time Open and Click rates for Emails (Incomplete - have some doubts)
7. Whitelisting update
8. Derived group name during message creation
9. Split lists

For detailed information, see Solutions > Engage+ New UI > Release Notes.