In an era when Broadway revivals of beloved musicals can seem dispiritingly skimpy, this handsome production offers a generous feast for the eyes, trimmed in holiday cheer for an added spritz of currency...And the evening’s performers — including a bona fide Broadway grande dame, Chita Rivera; a host of plush-voiced singers; and the jovial imp Jim Norton as the evening’s M.C. — throw themselves into the winking spirit of the show...Despite its varied charms, “The Mystery of Edwin Drood” remains a musical that ultimately adds up to less than the sum of its hard-working parts. The overelaborate finale — which includes not only the choosing of the murderer but also the selection of a detective and a happy couple to be paired off — somewhat taxes our delight in taking part…But then, who has not felt a bit deflated upon completing a page-turning detective story?...The musical “Edwin Drood” at least leaves behind moments of shimmering musical pleasure to savor, long after the miscreant of the night has been booed off the stage.