If given the opportunity to collaborate with the Spark team on a broader scale, I would:
Conduct More User Interviews & Tests
Getting more user interviews would be the most important step in creating a better case study. I chose to feature Spark App as a case study because I rely on it for my freelance business. I have a certain passion for email and organization. It's the second most used app on my phone so I need the input of other freelancers to help me see past my own biases and desires so that I can understand the pain points I have not yet encountered.
Conduct A Feature Audit
Based on my interviews and tests, my hypothesis that Spark Mail has too many features for individuals and small teams was validated. As a result many basic functions are buried and many users feel lost.
Hire A UX Writer
When testing my prototype the most common pain point for users is not knowing the difference between the two types of folders. Specifically smart folders, where you have to utilize a type of filter tag but there is no description of what a filter is and the instructions are vague and only add to the confusion. A UX writer would help me uncover effective microcopy that gives Users guidance that is clearer and helpful.
A/B Test Verbiage
Testing my prototype revealed that users are familiar with the concepts of smart folders and filters. The verbiage is unfamiliar to most so constructing singular phrases that resonate across multiple audiences can remedy the confusion.