Thanks for the nice feedback. Currently, the few ways you can do cross-region replication with Redis is the following:
dynomite - A generic dynamo implementation for different k-v storage engines
How to create multi-region database replication with Redis Enterprise | Redis Labs
Walkthrough and explanation of the process of replicating data in a Redis Enterprise cluster.
But you could also use DynamoDB Global Table as a caching solution but it does not provide all the goodies from Redis (list, sets, …).
As for the peering between regions, VPCs now support cross-region peering and it goes over the Amazon network and you don’t have to anymore maintain HA of your VPNs manually — great stuff!