After growing at a neck-breaking speed, Groupon has become the recipient of attacks from all sides after its stumbling performance post-IPO. Among the points against Groupon are: slowing growth in its core daily-deals business, poor performance in Europe, accounting issues and questions about its leadership. “The trouble with Groupon’s core business is simple: for too many customers, the value proposition is not compelling.” Groupon has shown that it doesn’t truly understand the day-to-day realities of its customers and how its core offering has failed them. But not all is lost for the daily-deals company