the thing about the challenges in the last two minutes also is that it is very inconsistent.....if the play ends inbounds and the clock is running, they won't stop it for review, because that would benefit the team with no timeouts.....the only time they will review is on a play where the clock stops.....those plays where the clock is running could be just as important, yet won't be reviewed....to me if you are going to make it part of the game, then make it part of the whole game.....just because it is last two minutes it shouldn't change anything....if coaches are able to manipulate it a little to their advantage by stopping the clock, etc...then so be it......make it so they get a 10 second run off or something if they are wrong.......
I also think that if a coach uses a challenge and he is proven right, he should get to keep it.....none of this have to get the first two right to get a 3rd bs.....