Product-led design. Business, design, and technology contribute equally, and the product is observed with a co-operative, impartial attitude — the product tells us where it needs to go. Not business-led, not technology-led: self-steering. Each product team paired a designer with a business architect and a solution architect, jointly responsible for holistic definition.
Experience in concentric layers. Usability and UX at the core — one user, one interface. Around it, service design — the customer's total experience. Around that, enterprise experience — employees, support staff, stakeholders.
The argument that sold it — support staff forced to work with one hand tied behind their back cannot deliver good support. Fix their experience and end-customer experience rises, while churn and training needs fall. Ordinary now; distinctly uncommon in 2012.
Trade-off accepted — Distributing authority is uncomfortable for organisations used to a clear owner.
The trio model was later reused as the standard team shape across product teams rather than applied case by case.