As a part of the Informatica Cloud Spring 2017 upgrade, Informatica Secure agent is being upgraded as a platform that supports multiple pluggable engines, provides high availability, and reduced downtime during upgrades. Some of the features that DiscoveryIQ currently offers will have an impact as an effect of the change in Cloud metadata. DiscoveryIQ agent and features of DiscoveryIQ like "Agent Environment History" and "Auto Streaming of logs" would not be available. Most of the important features would continue to be available after 26 April 2017.
Here is a quick reference about what is changing in DiscoveryIQ.