Any worthwhile post-collegiate coach would point Bizzari towards the 2012 Olympic team.
I think the animosity towards Bizzari is based on two factors:
1) Her collegiate success proves high volume training is entirely unnecessary. She's been doing remarkably well running about as much time each week as Lagat needed to win world medals.
2) Nike could not buy her off. In other words, she was savvy enough to negotiate a better deal, considering all options. Nike really had nothing special to offer her. We can expect more attacks from the Nike 'public relations' team.
Though both Koll and Bizzari were well coached as collegiate athletes, Bizzari has notably more room for improvement. Her collegiate 5000m can become her 10000m pace running 60-70/week. Koll is more or less stuck trying for the marathon.
I'm disappointed that Bizzari would go to Mammoth, but hopefully she wont be overtrained there.