Is that across all communities? I can see how for aviators it'd be a sign you were getting sent out of the game as it seems the epitome of a non-production gig but is it as much of a black hole for every other designator?
Related: I've been seeing these columns by a female former Marine LTC who was in charge of the female instruction at Paris Island and wrote a book about it, she's been pretty vocal about training standards for females in the military so it's gotten her a lot of press time, so it's just interesting to hear that that's a job you don't want for your career.
For ground officers in the USMC, it's not considered a bad deal at all for a company-grade B-billet. You actually get a command, vice being on the battalion or regimental staff. I've never heard of an aviator going, though, and there's probably a good reason for that.
As a LtCol (not LTC) command tour, it's not considered the same as a "Victory" unit (the MCC designations for line units usually start with Vs), but it's still a command, and if you don't get fired, you stand a good chance of making colonel.