the kvetching and moronic social media backlash about Nicole Kidman being cast as Lucille Ball in the new movie “Being the Ricardos.” You were wrong, guys. The actress is sensational in the part — and is doing the finest work of her career.She nails the off-camera Lucy in her prime: the acidic tongue, her dream of a normal suburban home life, disdain for mediocrity and especially the unparalleled power she wielded as a woman in showbiz in the 1950s.