Many see this episode as extremely humilating to the characters. But considering Spock's furious hand reaction in Act Three where he barely suppresses his fury, plus McCoy admitting his own great anger, isn't that exactly the point? And Alexander's, and Uhura's and Chapel's too. I don't see much disparity between the posters and the writer's viewpoints.
Though Shatner semed to embrace the weirdness a bit too much, hamming up especially in the classic Act Two dance routines. When we saw him only from the back jumping the Tweedledee Bop, I find it hard not to burst out laughing.