Again, thanks for the input, I haven't posted on the Discord yet, but I will. I figured out a solution to the artifacts on the second floor, simply to eliminate the floor in that area, but immediately after I found a way to get rid of the thing that caused the artifact. Oddly enough, I decided I liked having second floor that way after all, so I left it that way. I got rid of the fourth floor and the workshop area and put the training room in where the workshop was. I also decided to make some custom content to enhance the lot.
The custom content I created includes an outdoor Nookington's sign, some wall hangings and banners with the AC characters (which I am calling mascots for the company) and Nook logo, a modded clock wall clock with a tanuki on it instead of the llama, a labor law poster, a union poster (International Brotherhood of the Teamsters), and anti-theft poster featuring Angela Pleasant's mugshot with her in a cheer uniform, a picture of cheerleaders for Regina Pom's office (she's the Pleasantview asset protection agent and also a teenage cheerleader 10 years younger than Angela Pleasant, deliberate irony), hanging signs above the different food stations similar to what Sodexo uses in cafeterias, and a mod to the cash registers so they have a weights and measures inspection sticker on them like in real supermarkets and some changes to the register screens. I think the use of certain intellectual property here fits the criteria for fair use, the same way lots here based on places like Walmart and Publix Supermarket do.
I should probably mention that this lot is ultimately going to be part of a larger project I am working on (which will take some time to complete; it is a megahood with all of the Maxis neighborhoods merged plus a few custom subhoods), but I think this lot is a piece Simmers might be interested in having in its own right. Part of the reason I opted to 86 the workshop is because a factory called Able Sisters Manufacturing, to also be owned by Tom Nook, will produce all of the producible things.
As for the furniture, I'm thinking that the best solution is to leave that section of the store empty and allow the downloader decide what to stock in their Nookington's. After all, Nook's store has different inventory every day in AC. I say this realizing that Vic doesn't have sufficient familiarity with AC to comment. Again, I plan on posting for feedback on the Discord as suggested, just wanted to offer an update as to what I'm doing here.
One last thing (that doesn't require familiarity with Animal Crossing): I'm a bit confused as to the policy about including content from dead sites. I would like to include some things from Sim Wardrobe (that are available on the graveyard), and I read that including content from dead sites is okay regardless of the creator's reuse policy as long as credit is offered (I've been digging for about an hour now looking for the link, I can't find it). Sim Wardrobe never really seemed to have a clear policy on reuse, so I'm curious as to whether it is okay to use it or should I just link to the graveyard in the lot description page.
Thanks in advance.