As a rule, published blueprints are upgraded as published blueprints.
However, there are exceptions to that rule. Multi-machine blueprints are upgraded as composite blueprints that contain blueprint components. Multi-machine blueprints that contain unsupported settings are upgraded as unpublished.
vRealize Automation 7.x takes a blueprint snapshot at deployment. If you encounter reconfigure problems when updating machine properties such as CPU and RAM in a deployment, see Knowledge Base article 2150829 vRA 7.x Blueprint Snapshotting.
For more information about upgrading blueprints, see Upgrade and vApp Blueprints, vCloud Endpoints, and vCloud Reservations and Understanding How Multi-Machine Blueprints Are Upgraded.