I think it was wonderful how their friendship stayed until the end. I wish the writers were kinder to Mr. Edwards, but that's not what they wanted, he suffered a lot.
I like how in the episode where he marries Grace, Caroline says (paraphrasing) The children are fine, Mr. Edwards has taught them all how to spit further than anyone in Walnut Grove."
Coming from her thoughts on the first episode to that was worth a smile. : )