I always laughed at those Sandra Lee 'cooking shows'. Most of the time she bought something already made from the grocery and then just put something on top and reheated it. Not surprised she is no longer on Food Network. I never figured out who exactly her style of 'cooking' would appeal to.
I found 17 mashed potato recipes on the Food Network associated with Pioneer Woman. Can the OP post the recipe link so we can see the ingredients/ratios? Mashed potato recipes can be a matter of personal preference. Adding some cream cheese, heavy cream, butter can improve them, but you can also go too far and they won't taste much like mashed potatoes anymore. The type of potato you use makes a big difference in the final product. Also if you overmix the potatoes, you can create a gummy consistency more like wall paper paste.