The Mezzanine

I'd agree with this assessment having watched four Moffat series to date: Coupling, Doctor Who, Sherlock, and Jekyll. He reminds me a little bit of Aaron Sorkin -- who equally gets wrapped up into whatever idea he's chasing and characters be damned. Also Spike Lee who does the same thing.

Whedon started to go the direction too after he got successful.

I think they get a little into their "idea" /"symbolism" and lose track of the characters as a result?