Allow multiregion sharded clusters to have Primary nodes in multiple regions
For multi-region sharded clusters, the primaries for each shard remain in a single (highest priority) region in Atlas. If these primaries can be spread across multiple regions, that will a) provide consistent average response time for applications that connect from multiple regions as active-active b) Limit the blast radius if the highest priority region is unavailable c) Better distribution of workload from an application side.
This architecture is currently possible with EA deployments but not with Atlas.
The flexibility one has with sharding EA on-prem should be available in Atlas as well. Building active-active - meaning handling ingest/writes from all regions - is important for cloud apps.