Actually, it's the other way around. The discourage/prohibit arrivals during peak departure periods (notably right after the airshow ends). The departures are already throttled if there are arrivals. The guys on the MOOCOW can't release a departure if there is conflicting traffic on final.

The problem in the north 40 this year was they messed up the grass drainage when they straightened the Bravo taxiway. Hopefully, they'll work on that over the winter.