For consideration by the collective wisdom on this board....what about invoking 3-4-3 in this situation?
Our gut on this play is telling us something isn't right. The way the QB left the ball, B jumping on the dead ball, etc. There was 15 seconds left when the ball was declared dead, which left plenty of time to line up and spike it. Was B jumping on the ball an "obviously unfair" tactic? Probably not, and I wouldn't go down the road of a possible DOG by B either, but the defense got a tremendous advantage, and the net effect was the game clock continuing to roll down while the crew was trying to sort it all out.
After B jumped on the ball, was there an opportunity to get everyone reset (including the crew), and winding it up again with both teams at the line ready to go?