So, I've read the books, I've seen the movie, I've even binge watched the in one night, the show not the books and movies. I'd like to point out a few things.
1) Tom Cruise: great actor, high profile brings a lot to whatever he does. Not the right person to intimidate someone at 5'-whatever. Nor does he have the mass or built to go toe to toe with someone who is use to being intimidated by cops or law enforcement. Plus he's not sarcastic, blunt or have the look of someone who could 'ruin you're life with a phone'. Period.
2) Alan Ritchson has all that in one tightly wound up back of vengeful, homicidal, sarcastic, quick-witted ball of mean. He feels like he has been in the Army and seen $h!t and been blown up. He has that look of someone who's been shot at and shot back all while cracking jokes with his buddies behind cover.
Military people will get him and love him and this show. I know i do and I was in the Army. I laughed so much during the show at the things that were said and how they were said. Can not wait for more.