Clancy's range of books have stood the test of time.
Go back and reread Hunt for Red October and understand this is a first time published author... who was so ahead of the curve most publishers didn't want to publish him! Insane in hindsight. Just goes to show marketing people aren't the brightest kettle of fish.
Although this series doesn't quite perfectly get it, it's certainly a lot better than the car crash of Rings of Power - at least the writers of this have obviously read at least some of the books and understand the characters. So yes, it's a bit more kiss kiss bang bang than the books but that is the medium.
Krasinski is a bit more gymbod than I always imagine Ryan but you know Krasinski will make anything work - and Krasinski's personality like Alec Baldwins and Harrison Fords is a bit more accurate - no offence to others but it's a personality thing)
Why John Clarke is called Mike November here is anyone's guess, but Michael Kelly is perfect for the role, as much as Dafoe was years ago. (Yes, I like the Without Remorse film, but that isn't the John Clarke from the books and this isn't a skin tone thing it's a personality thing.
Casting throughout the entire series has been great tho, Pierce, Cornish, Gabriel, and all the series co-stars...
A fair few other US Showrunners should learn a fair bit from this: Respect the source and don't insert your crappy untalented ego - you are not a better writer than these Authors.