Evaluate the effectiveness of Starbucks' current business strategy execution in terms of pricing, differentiation, and market demand. Modification to the strategy that could help the company to implement new distinctive competencies, provide a rationale to support your response.

Evaluate the competitiveness of Starbucks' positioning in its industry utilizing the value creation frontier model, analyze the strengths and weaknesses of Starbucks' differentiation strategy, and determine the main possible implications inherent in the application of the strategy.