Could you please talk more on how you did the user studies? Were they in-person or remote?
Contextual Interviews or Ethnography?
If interviews then how did you frame the questions and then interpret the findings.
Also do you guys have a conceptual model of your application, basically a map of how user connects his goals to activities http://boxesandarrows.com/conceptual-models-in-a-nutshell/ (Any team member interested in Interaction Design (not UI, pure IxD) would have heard about it.