I just couldn't picture Nels being this mean...he might be embarrassed but his sister wasn't that obese and his wife certainly wasn't slim. He was always a kind man, it just didn't fit.
Harriet not being slim herself, joked a bit too much about Annabelle. That did make Nel crack and visit her but I just didn't like the script.
Also I get tired of seeing Laura do immature things to get Almonzo...switch the cinnamon to pepper, drench his date, she had done so many other things in the past and hardly ever got punished, caused her parents angst running away, her jealousy making Albert run away...sometimes I realize why I like other characters better. including Nels : ) I'm glad he got to have a larger part in this show, even if it wasn't a great one.