Long lost in the torrent of tabloids, lost in the fickle four-lady shuffle of country radio, is the truth that LeAnn Rimes – whatever her choices, relevance – is an exceptional country artist. An artist who hit her commercial peak early, but whose creative peak is still sloping up with each passing year, as her natural talent imbibes the wisdom and weather of age. The chipper tween who Patsy-parroted through “Blue” was charming, but nowhere near as compelling as the guarded optimist of “What I Cannot Change.” And even she, in turn, sounds a little simplistic compared to the woman we now encounter in “What Have I Done.”