Here are the Instant related features in the 7.4 release notes (available at support.arubanetworks.com):
AMP now collects and processes IDS and authorization failure events from Aruba Instant IAPs in the
same way as other SNMP traps. These events can be found in the Device Event log.
AMP now supports Aruba Instant firmware version 6.1.2.0-2.0.0.0 which contains configuration template
updates. Multi-platform image upgrade is now supported for Aruba Instant 6.1.2.0-2.0.0.0_30206.
Aruba Instant uptime is now tracked.
IAPs in an Aruba Instant implementation can be rebooted all at once in AMP.