Okay, so this A/B test is already live, and I don't think I can update the code because that would affect the test results.
My question is - If I were to create an audience in AT's audience library, can I do that? I want to create one audience group for Control and another audience group for Treatment. You are right, I want to use these audience in Analytics Workspace to see how did they perform against other success metrics. It is easily achievable via A4T but this particular test used AT as a reporting source, so there is no way I can onboard this test results to Analytics Workspace.
@emmak109
While adding tracking code like this should not have any impact on reporting, its not recommended when test is already live as it will not provide a complete (and possibly a correct) picture.
Unfortunately, there's no other way to pass the experience-metadata to Analytics if you are not using A4T.