Not sure if this is relevant to anything, but one thing that always stick out to me about Norma's interaction with Walter is his insistence on the Double R restaurants carrying Norma's name ("Norma's RR Diner"). Norma refuses obviously, but I can't help but think this is somehow in contrast to the Judy's Diner Cooper visits in ep. 18. Perhaps Norma choosing to dedicate herself to integrity, her community, and the ones she loved allowed her to avoid a fate similar to that of Judy (Sarah Palmer?) -- Sarah's decay somehow being signified by the fact that a diner carries her (or JUDY's) name, and Norma's success and happiness signified by the fact that a diner does not bare her name.
If this is the case, then Dr. Jacoby's golden shovels really did play a more significant role in this story than we realized. The shovel saved Nadine, who in turn released Hank, who in turn professed his love to Norma, giving her the confidence to finally back out of her dealings with Walter. I never really thought much of the Walter character, but maybe in a sense he is some agent of darkness, whether overtly or just symbolically. Maybe Walter seeks to do to Norma what the frog-moth-thing did to Sarah, albeit in a slightly different fashion. And if Norma was saved from this fate by Dr. Jacoby/Nadine/but mainly Ed, could Sarah be saved in a similar fashion? Or was that Cooper's plan all along -- to get Laura to help him shovel Sarah out of the shit?
Also of note is the fact that Walter tells Norma she could have 7 thriving restaurants instead of just 1 -- I don't keep up with the numerology of Twin Peaks, but i do get that 7 is supposed to be one of the more-bad numbers.