In the above example the Sam and Will outside linebackers are guys with true linebacker skill sets. It is completely impractical to have either of those players play a deep 1/2 safety technique. One solution is to use the Will LB in the role of the a cover 2 corner by walking him out over #1 and playing the Corner in the role of the deep 1/2 safety off the hash.
This solution can make sense for all the personnel involved. The Corner may not be a physical beat 'em up player and may be better suited to play the deep 1/2. Especially if the Corner is typically playing a deep 1/3 or man. The Will may be the better choice for being physical and re-routing the #1 receiver. The Will already practices being a flat dropper in other coverages. Keeping the run support structure similar is another factor. The Will is typically the force player in most 4-4 defensive structures. By widening him out to the role of "corner" the Will is still the force player.
The defense could also choose to play a 1/4 1/4 1/2 concept this way.
By having a tag word to align the Will out of over the #1 receiver weak the defense can also build a natural disguise package with other base calls it is already running.
The defense can show the FS and Corner deep on the hashes with the Will walked out on #1. At the snap the coverage can easily roll to a base Cover 3 concept.
The defense can also easily walk the Safety down off the hash and roll the corner to deep 1/2 and play a Robber coverage concept.
Basic pressures now have a naturally added change up element as well.
A standard 4-4 outside linebacker zone dog can easily function like a corner dog.