Yes, Hurts was rusty and post-concussed, but the Packers mixed up defensive looks albeit ending up in alot of 2 high.
When a team has corner, not just the safeties. occasionally dropping into the two deep zone, the QB has to read If it is man or zone and if zone, which of the safties/corners are going to be deep, which takes time, especially when you are rusty/concussed.
Further, with Brown, when the defense plays a two high look, there could have been in man with a LB underneath, further adding variation to coverage schemes.
The use of motion helps a QB determine which coverage is likely.
It was a very good game plan....4 turnover, and forfeiture on downs, giving up 22 points, is exceptional. The Jets apparently were impressed as well.