No, they didn't fire John Knicely. Or Rachel Pierce. Or Jimmy Siedlecki. Or Gary Smollen. Or Brian New. Or Sheila Brummer.But anyone comparing Maniko Barthalemy's recent taped reports to those she delivered when she first arrived can't help but notice the improvement in her diction. Gone is the streety, whiny "Queen Shaniqua" sound, and in its place is a much more palatable delivery.While her