Why is the Refresh Creatives tab in both the Template level and the Wave level?

System

Refresh creatives resets the Template "snapshot" that is being served by the Optimost servers for a specific template. Refreshing creatives at the template level results in a "snapshot" being taken at that moment for all waves referencing that template. However, there may be an instance where it makes sense to only retake the "snapshot" for a particular wave.
For example, a wave 1 could be running to customers in the "All other visitors" Persona, while doing Quality Assurance testing in Wave 2 in the "QA" Persona. During the QA testing, an issue is discovered around a value that is not being tested in Wave 1. A template changes is required to fix the issue. One can then refresh creatives for Wave 2 only by going to the Wave 2 level in the QA persona. Refreshing creatives at this level would not affect Wave 1.