Product idea: A/B testing in Workflow Automations

Hi! This is an idea for Workflow Automations: adding the ability to A/B test the initial group of people who enter a Workflow Automation. (Not necessarily a Targeted Email A/B test, but analogous.)

Example: every day a few people trickle in to a workflow automation via a Saved Search. The first Action/Decision for the automation is to split the people into two equal groups and send them down different branches. Then during each branch, people receive one or more emails, and they either click/donate or they don’t. 

This would essentially allow someone to test two versions of a welcome series against each other in real time. 

Wouldn’t that be cool?