But after that teasing introduction, Tammy Faye’s signature Kabuki facade barely figures in the disjointed, strangely bland musical that opened on Thursday at the newly renovated Palace Theater. It is laudable that the show’s composer, Elton John; lyricist, Jake Shears (of Scissor Sisters); book writer, James Graham; and director, Rupert Goold, tried to go behind the mask of this complicated, outsize woman, whose public persona was shaped by and for television. The problem is that they ended up making her smaller than life.