MongoDB 3.2 introduces features designed to support mission-critical applications, including document validation and an enhanced replication protocol. Document validation allows users to enforce checks on document structure, data types, and other fields, providing data governance standards while maintaining the benefits of a flexible document model. The enhanced replication protocol offers faster failover and stricter durability guarantees for write operations across replica sets, reducing failover intervals by optimizing algorithms used to detect primary failures and elect new primaries. Additionally, MongoDB 3.2 simplifies sharded cluster management by deploying config servers as a replica set, improving metadata consistency and manageability, and allowing for higher levels of availability and lower cross-region latency.