The ability to red flag any play makes sense IMO.
By allowing a team to red flag a play that a game altering penalty may have occured , but missed it allows for real time corrections which would reduce mistakes and help assure a fair outcome IMO.
If you throw the red flag and no penalty can be found or a penalty on the opposite side has occured the red flag option has expired and the penalty gets enforced.
I like this idea and have been trying to get it to take hold in the NFL.
Not at all,
The flow of the game would not change If utilized properly IMO.
If you use the red flag option and the officiating crew doesn't agree with you, thats it on reviewing a play in this manner.
This is not something a coach would or could try to use on every play.