OK, I have heard from some of my FBS contacts (following their recent conference clinics), and I am being told that (per 3-5-2-e and AR 3-5-2-V) when Team A substitutes and tries to snap before Team B can “match up,” and the snapper actually moves the ball to snap it, as in the past, we stop the action, and now we charge Team A with a dead-ball DOG foul. Then we warn the offensive HC that any further use of this tactic will be a UNS. So, bottom line, first instance (only) = DOG and warning. All instances thereafter = UNS.
So, essentially, the only thing that changed is that Team A gets hit with a DOG on the first instance (whereas it was "no foul" previously).
There are actually three possible scenarios related to this tactic:
1) Team A actually tries to snap the ball (DOG or UNS, as described above).
2) Officials prevent the snap and the play clock expires while Team B is legitimately attempting to complete their ‘match-up’ substitutions (Team A DOG or UNS, as described above).
3) Officials prevent the snap and the play clock expires while Team B is taking excessive time to complete their ‘match-up’ substitutions (Team B DOD).
Admittedly, these scenarios are unusual, but, this is an editorial change that we need to understand, should one of these scenarios happen.
I don't know why they removed the reference to the HC warning in the AR. If they had left that in, I don't believe there would have been any confusion.
Go forth and prosper, young grasshopper. (Bonus points to those that can identify the two TV shows referenced.

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