Just in regards to #5...isn't there something in the rulebook that says the game cannot end on a defensive penalty and the offense gets to run one extra play? Usually referring to regular time I know and usually involves the clock, typically on a hail marry if there's DPI. Wondering why that wouldn't apply in this scenario?
#1 makes no sense to me, how many times have you seen the refs huddle up to discuss an intentional grounding call and then throw a flag? Why would looking at a reply affect the ability to do this? I think the use of replay should be used to determine if there's been a penalty.
#2 actually makes sense to me the way it was applied in the scenario.
#3 you'd probably see the play blown dead if it played out like the scenario, but if not I guess it makes sense.
#4, I would assume Tomlin would accept the penalty so the game wouldn't be sudden death, Pitt goes down to kick a FG then the Ravens march down for a TD and win the game.