I thought the show went downhill the last couple years. I like the Frank Burns and Henry Blake era best.
I thought Potter was far superior to Henry Blake. He was a much more developed character. Blake was a buffoon. Same for BJ (Mike Farrell) vs Trapper. Just a much more multidimensional character. After Frank left they even made Margaret a much better character.
It’s interesting that both Wayne Rogers and MacLean Stevenson both left because they expected to be on par with Alda, but they both ended up being his straight men.
I also felt like the earlier seasons were too closely tied to the movie. I though the series was much better when they went on their own.
But I also can see how some folks don’t want all the character development and preachiness in a half hour sitcom.