I know many vets of the Korean War who liked the show; they said it was a pretty accurate portrayal of war, as far as Hollywood and TV go. They seemed to view the show as being more about how the human spirit manages through highly stressful situations vs an anti-war statement...indeed, many people loved the Frank Burns character and thought he was the greatest "stupid" character of all time, and his departure was when the show Jumped the Shark.
I would watch a M*A*S*H recast in 2018 with Will Smith as Hawkeye.
Somehow I don't think "Spearchucker" will be in the remake.