[exratione]

The pain point for what you want there is the versioning and deployment side of things: how you update the application as atomically as possible.

I need to get Lambda Complex into real apps for a while in order to understand what is really, actually needed around the transition of the interface with other AWS resources on update of version. Currently I'm sure it's going to be a major pain to have to write some code to redirect the flow of events to a different queue, but that's still better in my mind than to try to manage versioning with a single queue or other source of events that is not included in the CloudFormation template or has to be managed as a special case during updates.

The other pain point is monitoring of the application state and clearing up after it. Lambda functions spawn infinite log groups in CloudWatch, and they don't get deleted without some sort of automation to go do that. It isn't clear to me what the best approach is at this point in time to attach monitoring and alerting to CloudWatch Logs. I'd almost rather leave them alone and primarily monitor via SQS queue attributes, leaving the CloudWatch logs for manual inspection.