“Staged by Susan Stroman with impressive fluidity, given its heft, “Young Frankenstein” has a cast of expert merrymakers; shtick galore; winning dance numbers; elaborate sets by Robin Wagner that are marvels of seamless stage technology; and all the explosions, fog and wowie lighting effects (by Peter Kaczorowski) a rumored $20 million budget can buy. But the humor is choppy, and the one-liners repeated from the film script (by Brooks and Gene Wilder) can fall flat.”