^ Nice trash TV reference.

I think its mostly technique and goes mainly to the lack of familiarity of the DBs with zone coverage techniques.

The most baffling coverage of all is the trailing by too far coverage on a crossing route (this is man to man) and the failure to have anyone on the other side of the field to clock the crossing route. This might be skill of receiver avoid the other defenders, but I also think its the effect of threatening to send six pass rushers most downs.