Whether she was fired or left on her own accord, the bottom line is that Megan Fox is no longer a member of the "Transformers" franchise. Which means Shia LeBeouf's Sam Witwicky needs a new love interest.Enter Rosie Huntington-Whiteley. Much more agreeable on set, but can she act?Since the British model and actress joined the cast for the upcoming "Transformers: Dark of the Moon," speculation has centered on whether she'd be an improvement on the theatrically-maligned Fox.