Yes, make ASU try to win without JD’s run yards on broken plays.
Setting the edge is hard enough on run plays. On broken pass plays it gets so much harder because so many defenders drop back from the LOS and the pass rush desperately works to get the QB. Into the play there becomes a lot of open space with few defenders, then of course, QBs are faster than DLs.
A spy means taking a defender out of the pass plays to focus on keeping the QB behind the LOS because he really is not key to the pass rush. The other 10 need to step up more given to the loss of a defender in coverage. With a QB like JD the tradeoff is likely good because the pass game may not benefit as much as the loss of his broken pass play run yards. The spy is actually an aggressive defensive strategy. It will be interesting to see Whitt’s and Scalley’s strategy.