Mixed feelings about this. I can see what you’re saying about simplicity trumping complexity from a use-perspective but I happily use both Trello and Jira on a daily basis. They compliment each other yet serve very different purposes. They can, and should co-exist to meet very different needs. Add more functions and features to Trello and it loses its simplicity. Dumb-down Jira and it loses its value and enterprise-level reporting and tracking functionality. I simply don’t buy the argument that Trello was trying (or going) to overtake Jira as a product. Don’t forget there’s more to Atlassian than just Jira too. To me, Trello is simply a natural fit for a gap in their product portolio.